US20220143797A1 - Driving tool - Google Patents
Driving tool Download PDFInfo
- Publication number
- US20220143797A1 US20220143797A1 US17/434,319 US202017434319A US2022143797A1 US 20220143797 A1 US20220143797 A1 US 20220143797A1 US 202017434319 A US202017434319 A US 202017434319A US 2022143797 A1 US2022143797 A1 US 2022143797A1
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- US
- United States
- Prior art keywords
- operating
- gas
- valve
- trigger
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 41
- 238000007789 sealing Methods 0.000 description 34
- 230000005540 biological transmission Effects 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 9
- 230000004308 accommodation Effects 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 5
- 229920003051 synthetic elastomer Polymers 0.000 description 4
- 239000005061 synthetic rubber Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- -1 i.e. Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
- B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder
- B25C1/043—Trigger valve and trigger mechanism
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
- B25C1/047—Mechanical details
Definitions
- the present invention relates to a driving tool including a striking part and a driving part for operating the striking part.
- Patent Document 1 discloses an example of a driving tool including a striking part and a driving part for operating the striking part.
- the driving tool disclosed in Patent Document 1 has a motor, a magazine, a flywheel, a rotating shaft, the striking part, a coil spring, a clutch mechanism, a solenoid as an actuator, a trigger, and a push lever. Fasteners accommodated in the magazine are sent to a hitting position. Rotational energy of the motor is stored in the flywheel.
- Patent Document 1 Japanese Patent Application Laid-open No. 2007-118134
- the inventor of the present application has recognized a problem in which the power supplied to the actuator increases since the clutch mechanism is operated by supplying the power to the actuator.
- An object of the present invention is to provide a driving tool capable of reducing the power supplied to the actuator.
- a driving tool of one embodiment includes: a gas accommodating chamber accommodating a gas; a pressure chamber to which the gas is supplied from the gas accommodating chamber; a striking part operating in a direction of hitting a fastener by pressure in the gas supplied to the gas accumulating chamber; an operating member to and from which an operating force of a user is applied and released; a switching mechanism having a first state of shutting off the gas accommodating chamber and the pressure chamber when an operating force to the operating member is released, and a second state of connecting the gas accommodating chamber and the pressure chamber when the operating force to the operating member is applied; a mode switching mechanism having a connection mode of transmitting to the switching mechanism the operating force applied to the operating member, and a shut-off mode of preventing the operating force applied to the operating member being transmitted to the switching mechanism; a valve having, when the mode switching mechanism is in the shut-off mode, a supply state of supplying the gas in the gas accommodating chamber to make the switching mechanism to the switching mechanism the second state, and a discharge state of discharging the gas supplied to the switching mechanism to
- the driving tool of one embodiment can reduce the power supplied to the actuator.
- FIG. 1 is an overall cross-sectional view showing a first embodiment of a driving tool included in the present invention
- FIG. 2 is a cross-sectional view of the driving tool of FIG. 1 in which an operating force is applied to a trigger in a first mode and a striking part is located at a bottom dead center in a state where a push lever contacts with a workpiece;
- FIG. 3 is a cross-sectional view of the driving tool of FIG. 1 in which an operating force is applied to the trigger in the first mode and the striking part is located at atop dead center in a state where the push lever contacts with the workpiece;
- FIG. 4 is a cross-sectional view showing initial states of a trigger valve and a valve when a third mode is selected by the driving tool of FIG. 1 ;
- FIG. 5 is a cross-sectional view showing operating states of the trigger valve and the valve when the third mode is selected by the driving tool of FIG. 1 ;
- FIGS. 6(A) and (B) are cross-sectional views each showing a state of the trigger valve in a state where the first mode is selected;
- FIG. 7 is a block diagram showing a control system of the driving tool
- FIG. 8 is a flowchart of a control example in the third mode
- FIG. 9 is an overall cross-sectional view showing a second embodiment of the driving tool.
- FIG. 10 is a cross-sectional view of the driving tool of FIG. 9 in which a third mode is selected to apply an operating force to a trigger and a striking part is located at a bottom dead center in a state where a push lever contacts with a workpiece;
- FIG. 11 is a cross-sectional view of the driving tool of FIG. 9 in which the third mode is selected to apply the operating force to the trigger and the striking part located at a top dead center in the state where the push lever contacts with the workpiece;
- FIG. 12 is a cross-sectional view of the driving tool of FIG. 9 in which the third mode is selected to apply the operating force to the trigger and a valve is in a discharge state in the state where the push lever contacts with the workpiece;
- FIG. 13 is a cross-sectional view of the driving tool of FIG. 9 in which the third mode is selected to apply the operating force to the trigger and the valve is in a supply state in the state where the push lever contacts with the workpiece;
- FIG. 14 is a cross-sectional view of the driving tool of FIG. 9 in which the third mode is selected and the trigger valve and the push lever valve are in initial states;
- FIG. 15 is a cross-sectional view of the driving tool of FIG. 9 in which the third mode is selected and the trigger valve and the push lever valve are in operating states.
- a driving tool 10 shown in FIGS. 1, 2, and 3 has a housing 11 , a cylinder 12 , a striking part 13 , a trigger 14 , an ejection part 15 , and a push lever 16 . Further, a magazine 17 attached to the driving tool 10 is provided.
- the housing 11 has a cylindrical body part 18 , a head cover 19 fixed to the body part 18 , and a handle 20 connected to the body part 18 .
- An accumulator 21 is formed over an inside of the handle 20 , an inside of the body part 18 , and an inside of the head cover 19 .
- An air hose is connected to the handle 20 . Compressed air as a gas is supplied to the accumulator 21 via the air hose.
- a cylinder 12 is provided in the body part 18 .
- a head valve 22 is provided in the head cover 19 .
- the head valve 22 is movable in a direction along a center line A 1 of the cylinder 12 .
- the head valve 22 is made of synthetic rubber as an example.
- the head valve 22 is energized in a direction away from the cylinder 12 by air pressure in the accumulator 21 .
- a gas chamber 24 is formed between the head valve 22 and the head cover 19 .
- a stopper 25 is attached to the head cover 19 .
- An exhaust passage 26 is formed between the head cover 19 and the stopper 25 .
- the exhaust passage 26 is connected to an exterior B 1 of the housing 11 .
- An energizing member 27 is provided between the head valve 22 and the stopper 25 .
- the energizing member 27 is, as an example, a metal spring.
- the energizing member 27 energizes the head valve 22 in a direction along the center line A 1 so as to approach the cylinder 12 .
- the cylinder 12 is positioned and fixed with respect to the body part 18 in the direction along the center line A 1 .
- a holder 28 is provided in the body part 18 . The holder 28 positions the cylinder 12 with respect to the body part 18 in a direction intersecting with the center line A 1 .
- the striking part 13 has a piston 29 and a driver blade 30 .
- the piston 29 is arranged in the cylinder 12 , and the striking part 13 is operable in the direction along the center line A 1 .
- a sealing member 31 is attached to the piston 29 .
- a piston upper chamber 32 is formed between the head valve 22 and the piston 29 .
- the ejection part 15 is fixed to the body part 18 at an end portion opposite to a portion where the head cover 19 is provided in the direction along the center line A 1 .
- a bumper 33 is provided in the body part 18 .
- the bumper 33 is arranged in the body part 18 at a position closest to the ejection part 15 .
- the bumper 33 is made of synthetic rubber or silicon rubber.
- the bumper 33 has a shaft hole 34 , and the driver blade 30 is movable in the shaft hole 34 in the direction along the center line A 1 .
- a piston lower chamber 35 is formed between the piston 29 and the bumper 33 in the cylinder 12 .
- the sealing member 31 airtightly shuts off the piston lower chamber 35 and the piston upper chamber 32 .
- the cylinder 12 has passages 36 and 37 .
- the passage 37 is arranged between the passage 36 and the ejection part 15 in the direction along the center line A 1 .
- a return air chamber 38 is formed between the cylinder 12 and the body part 18 .
- the holder 28 airtightly separates the return air chamber 38 and the accumulator 21 .
- a check valve 39 is attached to an outer peripheral surface of the cylinder 12 .
- the check valve 39 opens and closes the passage 36 .
- the passage 37 always connects the piston lower chamber 35 and the return air chamber 38 . Air is present in the piston lower chamber 35 and the return air chamber 38 .
- the trigger 14 is attached to the housing 11 .
- the trigger 14 is rotatable about a support shaft 40 with respect to the housing 11 within a predetermined angle range.
- the housing 11 has a stopper 41 , and the stopper 41 prevents an operating range of the trigger 14 .
- An arm 42 is attached to the trigger 14 .
- the arm 42 is operable with respect to the trigger 14 about the support shaft 43 .
- An energizing member 44 is provided between the arm 42 and the housing 11 .
- the energizing member 44 energizes the trigger 14 and the arm 42 in a direction away from the handle 20 .
- the energizing member 44 is, as an example, a metal spring.
- the trigger 14 and the arm 42 which are energized by a force of the energizing member 44 , contact with the stopper 41 and respectively stop as shown in FIG. 1 .
- a trigger valve 45 is provided at a connection portion between the body part 18 and the handle 20 .
- the trigger valve 45 includes a plunger 46 , a body 47 , a valve element 48 , and an energizing member 65 .
- the body 47 has an accommodation recess portion 50 and a shaft hole 51 .
- the shaft hole 51 and the accommodation recess portion 50 connect to each other.
- An opening of the accommodation recess portion 50 is connected to the accumulator 21 .
- the valve element 48 has a cylindrical shape, and the valve element 48 is arranged in the accommodation recess portion 50 .
- the valve element 48 is operable in the direction along the center line A 2 with respect to the body 47 .
- the center line A 2 is each center of the valve element 48 and the plunger 46 .
- the plunger 46 is arranged over the accommodation recess portion 50 , the shaft hole 51 , and the exterior B 1 of the housing 11 .
- the plunger 46 is operable in the direction along the center line A 2 with respect to the body 47 and the valve element 48 .
- a passage 52 is provided in the body 47 , and the passage 52 is connected to the gas chamber 24 via the passage 53 . Further, the housing 11 has a passage 54 , and the passage 54 connects the accumulator 21 and the accommodation recess portion 50 .
- a sealing member 55 is provided to seal a portion between the body 47 and the housing 11 .
- the body 47 has an exhaust passage 56 , and the exhaust passage 56 connects to the exterior B 1 .
- the exhaust passage 56 connects to the accommodation recess portion 50 .
- a space 57 is formed between the valve element 48 and the body 47 . The space 57 connects to the shaft hole 51 .
- the valve element 48 is energized by pressure in the space 57 in a direction of approaching the accumulator 21 .
- Sealing members 58 , 59 , 60 are attached to an outer peripheral surface of the valve element 48 .
- the valve element 48 has a shaft hole 61 .
- the sealing member 60 shuts off the space 57 and the exhaust passage 56 .
- the plunger 46 is arranged over the shaft hole 51 and the shaft hole 61 .
- Sealing members 62 and 64 are attached to an outer peripheral surface of the plunger 46 .
- a flange 79 projecting from the outer peripheral surface of the plunger 46 is provided.
- the energizing member 65 is provided in the shaft hole 61 .
- the energizing member 65 is, as an example, a metal compression spring, and the energizing member 65 energizes the plunger 46 in a direction along a center line A 2 so as to approach the arm 42 . Further, the energizing member 65 energizes the valve element 48 in a direction of approaching the accumulator 21 .
- a land portion 67 is provided between the flange 79 and a first end portion 66 .
- the first end portion 66 is a position closest to the arm 42 in the direction along the center line A 2 of the plunger 46 .
- a gas chamber 68 is formed between an end surface of the land portion 67 and the body 47 in the shaft hole 51 .
- Two sealing members 95 are attached to the body 47 , and the two sealing members 95 airtightly seal the gas chamber 68 .
- the body 47 has an exhaust passage 96 , and the exhaust passage 96 connects the shaft hole 51 and the exterior B 1 .
- a shaft hole 69 is provided in the housing 11 , and a second end portion 70 of the plunger 46 is arranged in the shaft hole 69 .
- the second end portion 70 is located in the direction along the center line A 2 and opposite the first end portion 66 .
- the second end portion 70 is movable in the shaft hole 69 in the direction along the center line A 2 .
- the shaft hole 69 connects to the exterior B 1 of the housing 11 .
- the second end portion 70 is exposed to the exterior B 1 .
- the ejection part 15 is, as an example, made of metal or non-ferrous metal.
- the ejection part 15 has an ejection path 71 .
- the center line A 1 is located in the ejection path 71 , and the driver blade 30 is movable in the direction along the center line A 1 in the ejection path 71 .
- the magazine 17 is fixed to the ejection part 15 .
- the magazine 17 accommodates fasteners 72 .
- the magazine 17 has a feeder, and the feeder sends the fasteners 72 in the magazine 17 to the ejection path 71 .
- a shaft member 74 connected to the push lever 16 is provided.
- the shaft member 74 is movable with respect to the stopper 41 .
- the shaft member 74 is energized by the energizing member 97 in a direction away from the arm 42 .
- the energizing member 97 is, as an example, a compression spring.
- a valve 75 is provided in the housing 11 .
- the valve 75 has a plunger 77 and a support hole 78 .
- the support hole 78 is provided in the housing 11 , and the plunger 77 is arranged in the support hole 78 .
- the plunger 77 is made of metal, i.e., iron or an aluminum alloy as an example.
- the plunger 77 is operable in a direction along a center line A 3 .
- a solenoid 76 is provided as an actuator for operating the valve 75 .
- the solenoid 76 forms a magnetic attraction force when a current flows.
- the solenoid 76 releases the magnetic attraction force when no current flows.
- the plunger 77 is connected to the solenoid 76 and is operable by the magnetic attraction force.
- the housing 11 has passages 80 and 81 and an exhaust passage 82 , and the passage 80 connects to the accumulator 21 and is open to the support hole 78 .
- the passage 81 connects to the gas chamber 68 and is open to the support hole 78 .
- the exhaust passage 82 connects to the exterior B 1 and is open to the support hole 78 .
- Sealing members 83 , 84 , 85 are attached to the outer peripheral surface of the plunger 77 .
- An emerging member 86 is provided in the support hole 78 .
- the energizing member 86 energies the plunger 77 in the direction along the center line A 3 .
- the energizing member 86 is, as an example, a metal spring.
- the plunger 77 operates by the magnetic attraction force of the solenoid 76 and an energizing force of the energizing member 86 .
- the plunger 77 stops at an initial position when the sealing member 84 is pressed against an inner surface of the support hole 78 as shown in FIG. 4 .
- the sealing member 84 shuts off the passage 80 and the passage 81 .
- the valve 75 connects the passage 81 and the exhaust passage 82 .
- the solenoid 76 forms the magnetic attraction force
- the plunger 77 operates against the energizing force of the energizing member 86 .
- the plunger 77 stops at an operating position where the sealing member 84 is separated from the stopper as shown in FIG. 5 .
- the plunger 77 stops at the operating position.
- the sealing member 85 shuts off the passage 81 and the exhaust passage 82 .
- the valve 75 connects the passage 80 and the passage 81 .
- FIG. 7 is a block diagram showing a control system of the driving tool 10 .
- a trigger switch 87 is provided in the housing 11 , and the trigger switch 87 detects application and release of the operating force to and from the trigger 14 , and outputs a signal.
- the trigger switch 87 may be either a contact type sensor or a non-contact type sensor.
- a push lever switch 88 is provided in the housing 11 , and the push lever switch 88 detects whether the push lever 16 is pressed against the workpiece W 1 or the push lever 16 is separated from the workpiece W 1 , and outputs a signal.
- the push lever switch 88 may be either a contact type sensor or a non-contact type sensor.
- a microcomputer 89 is provided in the housing 11 as an example.
- the microcomputer includes an arithmetic processing unit, a memory, and a timer.
- the microcomputer 89 processes the signal of the trigger switch 87 and the signal of the push lever switch 88 .
- a power supply 91 connected to the valve 75 via a switch 90 is provided.
- As the power supply 91 at least one of a solar panel, a DC power supply, an AC power supply, a capacitor, and the like can be used.
- the solar panel is a panel for generating electricity with sunlight, and the solar panel can be provided on an outer surface of the housing 11 .
- the DC power supply may be either a primary battery or a secondary battery, and the DC power supply is provided in the housing 11 or the magazine 17 as an example.
- the capacitor is a passive element that stores and releases electric charges.
- the capacitors can also be defined as capacitors.
- the capacitor can be provided in the housing 11 or the magazine 17 as an example.
- the AC power supply is connected to the housing 11 via a power cable.
- the power cable can also be attached to an air hose connected to the handle 20 .
- a mode selection lever 92 shown in FIG. 1 is attached to the housing 11 .
- the mode selection lever 92 is provided so as to be operable to the housing 11 about an operating shaft 92 A, that is, to be rotatable.
- a user can operate the mode selection lever 92 to mutually switch any one of a first mode, a second mode, and a third mode.
- the support shaft 40 is provided on the operating shaft 92 A and is provided at a position eccentric from a rotation center X 1 of the operating shaft 92 A. When the mode selection lever 92 is operated, the support shaft 40 revolves as shown in FIG. 6(A) .
- a position of the support shaft 40 in the first mode is a position farthest from the plunger 46 .
- a position of the support shaft 40 in the third mode is a position closest to the plunger 46 .
- a position of the support shaft 40 in the second mode is between the position of the support shaft 40 in the first mode and the position of the support shaft 40 in the third mode.
- the position of the support shaft 40 is a position in a direction intersecting with the center line A 2 . Therefore, when the mode is switched, the arm 42 operates in the direction intersecting with the center line A 2 regardless of whether an operating force is applied to the trigger 14 .
- the switch 90 forms part of an electrical circuit between the power supply 91 and the solenoid 76 .
- the microcomputer 89 controls on and off of the switch 90 .
- no current is supplied from the power supply 91 to the solenoid 76 .
- the microcomputer 89 turns on the switch 90 , a current is supplied from the power supply 91 to the solenoid 76 .
- the user selects the first mode before pressing the push lever 16 against the workpiece W 1 to use the driving tool 10 while applying the operating force to the trigger 14 .
- the user selects the second mode before applying an operating force to the trigger 14 to use the driving tool 10 while pressing the push lever 16 against the workpiece W 1 .
- the microcomputer 89 detects the first mode or the second mode, the microcomputer 89 turns off the switch 90 .
- the user can select the third mode before pressing the push lever 16 against the workpiece W 1 to use the driving tool 10 while applying the operating force to the trigger 14 .
- the microcomputer 89 detects the third mode, the microcomputer 89 can turn on the switch 90 .
- a power switch 98 for switching on and off when the mode selection lever 92 is operated is provided.
- the power switch 98 is turned off when the first mode or the second mode is selected, and is turned on when the third mode is selected.
- no current is supplied from the power supply 91 to the microcomputer 89 and the microcomputer 89 is stopped.
- the power switch 98 is turned on, a current is supplied from the power supply 91 to the microcomputer 89 and the microcomputer 89 is started.
- various sensors 94 may be provided in the housing 11 .
- the various sensors 94 include at least one or more of a pressure sensor, a temperature sensor, a humidity sensor, and an acceleration sensor.
- the microcomputer 89 processes signals of various sensors 94 and can display or warn, on the display unit, an operating time from an operation of the user to an operation of the striking part 13 , operating speed of the striking part 13 , and inspection timing and repair timing of the bumper 33 .
- the arm 42 separates from the plunger 46 even if the user applies the operating force to the trigger 14 and presses the push lever 16 against the workpiece W 1 .
- the arm 42 does not transmit the operating force of the trigger 14 and the operating force of the push lever 16 to the plunger 46 . Therefore, the trigger valve 45 maintains an initial state.
- the microcomputer 89 switches a state of the trigger valve 45 by processing a signal of the trigger switch 87 and a signal of the push lever switch 88 to control supply and stop of the current to and from the solenoid 76 .
- the microcomputer 89 detects that the operating force to the trigger 14 is released and the push lever 16 separates from the workpiece W 1 . Further, when the microcomputer 89 detects that the operating force is applied to the trigger 14 and the push lever 16 separates from the workpiece W 1 , the microcomputer 89 turns off the switch 90 . When the microcomputer 89 turns off the switch 90 , no current flows through the solenoid 76 . Therefore, as shown in FIG. 4 , the valve 75 is in a discharge state in which the gas chamber 68 and the exhaust passage 82 are connected and the accumulator 21 and the passage 81 are shut off. Further, the trigger valve 45 is in the initial state. As shown in FIG.
- the flange 79 is pressed against the body 47 by the energizing member 65 .
- the sealing member 64 shuts off the space 57 and the exhaust passage 96 .
- the valve element 48 is energized in the direction away from the arm 42 by the energizing force of the energizing member 65 , and the sealing member 59 is pressed against the body 47 to cause the valve element 48 to stop at the initial position.
- the sealing member 59 shuts off the passage 52 and the exhaust passage 56 .
- the sealing member 58 separates from the body 47 , and the accumulator 21 is connected to the gas chamber 24 via the passage 52 and the passage 53 .
- the sealing member 62 separates from the valve element 48 , and the accumulator 21 connects to the space 57 via the shaft hole 61 .
- the sealing member 64 shuts off the space 57 and the exterior B 1 .
- the microcomputer 89 starts the timer when the operating force is applied to the trigger 14 .
- the microcomputer 89 turns on the switch 90 when it detects that the push lever 16 has been pressed against the workpiece W 1 within a predetermined time from a time point when the operating force is applied to the trigger 14 .
- a current flows through the solenoid 76 , and the valve 75 switches from a discharge state shown in FIG. 4 to a supply state shown in FIG. 5 .
- the valve 75 in the supply state connects the passage 81 and the passage 80 , and shuts off the passage 81 and the exhaust passage 82 . Therefore, the compressed air in the accumulator 21 is supplied to the gas chamber 68 through the passages 80 and 81 , and pressure in the gas chamber 68 rises.
- the plunger 46 of the trigger valve 45 operates against the energizing force of the energizing member 65 , and the plunger 46 stops at the operating position.
- the sealing member 64 moves to the space 57 , and the space 57 and the exterior B 1 connect to each other via the shaft hole 51 and the exhaust passage 96 . Further, the sealing member 62 is pressed against the valve element 48 , and the sealing member 62 seals the shaft hole 61 . Therefore, the valve element 48 operates against the force of the energizing member 65 by the pressure of the accumulator 21 , and the sealing member 58 shuts off the accumulator 21 and the passage 52 .
- the sealing member 59 separates from the body 47 , and the passage 52 and the exhaust passage 56 connect to each other. Therefore, the compressed air in the gas chamber 24 is discharged to the exterior B 1 through the passage 53 , the passage 52 , and the exhaust passage 56 . In this way, a state in which the trigger valve 45 shuts off the accumulator 21 and the passage 52 and connects the passage 52 and the exhaust passage 56 is the operating state of the trigger valve 45 .
- the head valve 22 When air is discharged from the gas chamber 24 , the head valve 22 operates by the pressure in the accumulator 21 . As shown in FIG. 2 , the head valve 22 is stopped in an operating state of separating from the cylinder 12 . The stopped head valve 22 connects the accumulator 21 and a piston upper chamber 32 , and shuts off the exhaust passage 26 . The compressed air in the accumulator 21 is supplied to the piston upper chamber 32 , and pressure in the piston upper chamber 32 rises. The striking part 13 descends from a top dead center toward a bottom dead center under the pressure in the piston upper chamber 32 . The driver blade 30 hits the fastener 72 in the ejection path 71 , and the fastener 72 is driven into the workpiece W 1 . Further, as shown in FIG.
- the piston 29 collides with the bumper 33 .
- a position of the striking part 13 at a time point when the piston 29 collides with the bumper 33 is the bottom dead center.
- pressure in the piston lower chamber 35 rises.
- the microcomputer 89 turns off the switch 90 when it detects that the push lever 16 has separated from the workpiece W 1 . Consequently, the solenoid 76 releases the magnetic attraction force, and the plunger 77 of the valve 75 stops at the initial position shown in FIG. 4 by the energizing member 86 and a pressing force due to a diameter difference between the sealing member 83 and the sealing member 85 . Therefore, the air in the gas chamber 68 is discharged to the exterior B 1 . Consequently, the plunger 46 operates by the energizing force of the energizing member 65 and the pressing force due to the diameter difference between the sealing member 64 and the sealing member 62 , and the plunger 46 stops at the initial position shown in FIG.
- valve element 48 operates by the energizing force of the energizing member 65 , connects the accumulator 21 and the passage 52 , and shuts off the passage 52 and the exhaust passage 56 . In this way, the trigger valve 45 switches from the operating state to the initial state.
- the head valve 22 When the trigger valve 45 switches from the operating state to the initial state, the head valve 22 operates to be pressed against the cylinder 12 and the head valve 22 shuts off the accumulator 21 and the piston upper chamber 32 and opens the exhaust passage 26 . Consequently, the striking part 13 rises due to the pressure in the piston lower chamber 35 , and the striking part 13 stops at the top dead center shown in FIG. 1 .
- the user selects the third mode, and can drive the fastener 72 into the workpiece W 1 by operating to press the push lever 16 against the workpiece W 1 within a predetermined time from a time point when the operating force is applied to the trigger 14 . Accordingly, when the predetermined time elapses with the operating force applied to the trigger 14 , the fastener 72 cannot be driven even if the push lever 16 is pressed against the workpiece W 1 .
- the microcomputer 89 continues to turn off the switch 90 when the operating force is applied to the trigger 14 and a predetermined time elapses in a state where the push lever 16 separates from the workpiece W 1 . Therefore, when the push lever 16 is pressed against the workpiece W 1 after the predetermined time has passed from the time point when the operating force is applied to the trigger 14 , the trigger valve 45 maintains the initial state. That is, the striking part 13 stops at the top dead center. The microprocessor 89 resets the timer once the user releases the operating force to the trigger 14 .
- the microcomputer 89 switches the valve 75 between the discharge state shown in FIG. 4 and the supply state shown in FIG. 5 .
- Switching between the initial state and the operating state of the trigger valve 45 is performed according to the pressure in the gas chamber 68 . That is, the solenoid 76 only controls the operation of the plunger 77 of the valve 75 .
- the magnetic attraction force of the solenoid 76 required to operate the plunger 77 is lower than an operating force required to operate the valve element 48 of the trigger valve 45 against air pressure in the accumulator 21 . This makes it possible to prevent the solenoid 76 becoming large. Further, the magnetic attraction force of the solenoid 76 changes according to the current supplied from the power supply 91 .
- the power supply 91 is a DC power supply that can be attached to and detached to and from the housing 11 or the magazine 17 , it can be a small-capacity DC power supply.
- the second end portion 70 of the plunger 46 is arranged at a position where it receives atmospheric pressure.
- the second end portion 70 is exposed to the exterior B 1 . Therefore, when the plunger 46 is operated from the initial position to the operating position, an area where the plunger 46 receives the pressure in the accumulator 21 can be narrowed. Accordingly, a force required to operate the plunger 46 from the initial position to the operating position can be reduced.
- an end portion 77 A of the plunger 77 which is close to the energizing member 86 , is arranged at a position of receiving the atmospheric pressure of the exterior B 1 as shown in FIG. 5 . Therefore, the force required to operate the plunger 77 can be reduced.
- an end portion 77 B of the plunger 77 which is close to the solenoid 76 , is arranged at a position of receiving the atmospheric pressure of the exterior B 1 . Therefore, the force required to operate the plunger 77 can be reduced.
- FIG. 8 is a flowchart showing a usage example of the driving tool 10 .
- the power switch 98 is turned on in step S 2 to start the microcomputer 89 . Further, the switch 90 is off at a time point when the microcomputer 89 is started.
- the microprocessor 89 detects that the operating force is applied to the trigger 14 in step S 3 , the microprocessor 89 starts the timer.
- the microcomputer 89 determines in step S 4 whether the push lever 16 is pressed against the workpiece W 1 within a predetermined time. When the microcomputer 89 determines Yes in step S 4 , the microcomputer 89 turns on the switch 90 . Therefore, the striking part 13 operates from the top dead center toward the bottom dead center. When the microcomputer 89 detects that the push lever 16 has been separated from the workpiece W 1 in step S 6 , it turns off the switch 90 and ends a routine of FIG. 8 .
- step S 4 determines No in step S 4 . Even if the push lever 16 is pressed against the workpiece W 1 in a state of step S 7 , the switch 90 maintains off.
- the microprocessor 89 detects that the operating force of the trigger 14 is released in step S 8 , it resets the timer in step S 9 and ends the routine of FIG. 8 .
- the routine of FIG. 8 is not performed and the microcomputer 89 is stopped.
- the user selects the first mode and the push lever 16 is pressed against the workpiece W 1 in a state of applying the operating force to the trigger 14 . Consequently, the operating forces of the trigger 14 and the push lever 16 are transmitted to the plunger 46 via the arm 42 as shown in FIG. 6B .
- the plunger 46 operates against the energizing force of the energizing member 65 , and the trigger valve 45 switches from the initial state to the operating state.
- the striking part 13 operates from the top dead center toward the bottom dead center.
- the plunger 46 When the push lever 16 is separated from the workpiece W 1 in a state where the user applies the operating force to the trigger 14 after the striking part 13 reaches the bottom dead center, the plunger 46 is operated by the energizing force of the energizing member 65 and stops at the initial position.
- the trigger valve 45 switches from the operating state to the initial state.
- the striking part 13 operates from the bottom dead center toward the top dead center, and the striking part 13 stops at the top dead center.
- the operating force of the push lever 16 and the operating force of the trigger 14 are transmitted to the plunger 46 via the arm 42 , as shown in FIG. 6(B) .
- the trigger valve 45 switches from the initial state to the operating state, and the striking part 13 operates from the top dead center toward the bottom dead center.
- the plunger 46 operates by the energizing force of the energizing member 65 and the trigger valve 45 switches from the operating state to the initial state.
- the striking part 13 operates from the bottom dead center toward the top dead center and the striking part 13 stops at the top dead center.
- the user can repeat more than once an operation of applying the operating force to the trigger 14 with the push lever 16 pressed against the workpiece W 1 and an operation of separating the push lever 16 from the workpiece W 1 to release the operating force to the trigger 14 .
- a driving tool 100 includes a housing 101 , an ejection part 102 , a striking part 103 , a push lever valve 104 , and a trigger valve 105 .
- the housing 101 has a body part 106 , a handle 107 , and a head cover 108 .
- the body part 106 has a cylindrical shape, and the handle 107 is connected to the body part 106 .
- the head cover 108 is fixed to a first end portion of the body part in a longitudinal direction of the body part 106 .
- the ejection part 102 is fixed to a second end portion of the body part in the longitudinal direction of the body part 106 .
- An air hose is connected to the handle 107 .
- the striking part 103 is provided in the body part 106 .
- the striking part 103 is operable in a direction of a center line C 1 .
- a cylinder 109 is provided in the body part 106 .
- the center line C 1 is a center line of the cylinder 109 .
- the cylinder 109 is movable along the center line C 1 .
- the holder 135 is provided in the body part 106 .
- the holder 135 has an annular shape, and the holder 135 positions the cylinder 109 with respect to the body part 106 in a direction intersecting with the center line C 1 .
- An accumulator 110 is provided in the handle 107 , the body part 106 , and the head cover 108 . Compressed air supplied from the air hose is accumulated in the accumulator 110 .
- the holder 135 forms a first gas chamber 139 and a second gas chamber 142 .
- the first gas chamber 139 is always connected to the accumulator 110 .
- a mount part 115 is fixed to an inner surface of the head cover 108 .
- An exhaust valve chamber 114 is formed between the head cover 108 and the mount part 115 .
- the mount part 115 has an exhaust passage 117 .
- the exhaust passage 117 connects to an exterior D 1 of the housing 101 .
- the mount part 115 supports the exhaust valve 118 .
- the exhaust valve 118 is movable in the direction of the center line C 1 with respect to the mount part 115 .
- the exhaust valve 118 opens and closes the exhaust passage 117 .
- a valve seat 119 is attached to the mount part 115 .
- the valve seat 119 is made of synthetic rubber, and the valve seat 119 has a passage 116 .
- the passage 116 connects to the exhaust passage 117 .
- the striking part 103 has a piston 121 and a driver blade 122 .
- the piston 121 is provided in the cylinder 109 , and the piston 121 is operable in the cylinder 109 in the direction of the center line C 1 .
- a piston upper chamber 120 is formed between the piston 121 and the valve seat 119 .
- the piston upper chamber 120 connects to the passage 116 .
- the piston 121 receives pressure in the piston upper chamber 120 , and is energized in a direction away from the valve seat 119 and in a direction along the center line C 1 .
- a sealing member 113 is attached to an outer peripheral surface of the piston 121 . The sealing member 113 contacts with the inner peripheral surface of the cylinder 109 .
- a bumper 128 is provided in the body part 106 .
- the bumper 128 is provided between the cylinder 109 and the ejection part 102 in the direction along the center line C 1 .
- the bumper 128 is a cushioning member made of synthetic rubber.
- a portion of the bumper 128 is located in the cylinder 109 .
- the bumper 128 has a shaft hole 129 .
- a piston lower chamber 123 is formed between the piston 121 and the bumper 128 in the cylinder 109 .
- the sealing member 113 airtightly separates the piston lower chamber 123 and the piston upper chamber 120 .
- a return air chamber 124 is provided between the body part 106 and an outer peripheral surface of the cylinder 109 .
- the holder 135 airtightly separates the accumulator 110 and the return air chamber 124 .
- Passages 125 and 126 radially penetrating the cylinder 109 are provided.
- a check valve 127 is provided on an outer surface of the cylinder 109 .
- the check valve 127 opens and closes the passage 125 .
- the passage 126 always connects the piston lower chamber 123 and the return air chamber 124 .
- the passage 126 is arranged between the passage 125 and the ejection part 102 in a direction along the center line C 1 .
- an energizing member 130 is provided in the body part 106 .
- the energizing member 130 is, as an example, a metal spring.
- the cylinder 109 is energized by an energizing force of the energizing member 130 so as to approach the valve seat 119 in the direction along the center line C 1 .
- the cylinder 109 is energized by pressure in the first gas chamber 139 in a direction of approaching the valve seat 119 .
- the cylinder 109 is energized by pressure in the second gas chamber 142 in a direction away from the valve seat 119 .
- the ejection part 102 is fixed to the body part 106 , and the ejection part 102 has an ejection path 133 .
- the driver blade 122 is operable in the shaft hole 129 and the ejection path 133 in the direction along the center line C 1 .
- the push lever 134 is attached to the ejection part 102 , and the push lever 134 is movable in the direction along the center line C 1 with respect to the ejection part 102 .
- a magazine 201 is attached to the ejection part 102 , and fasteners 202 housed in the magazine 201 are sequentially sent to the ejection path 133 .
- the push lever valve 104 includes a plunger 144 , a valve element 146 , a valve body 145 , a pressure chamber 180 , and an energizing member 147 .
- the valve body 145 does not move relative to the housing 101 .
- the valve body 145 has a cylinder shape, and operably supports the plunger 144 and the valve element 146 .
- the valve body 145 has a passage 143 and an exhaust passage 161 .
- the passage 143 connects to the exhaust valve chamber 114 via a passage 200 .
- the plunger 144 and the valve element 146 are operable along a center line A 5 .
- the energizing member 147 is, as an example, a metal spring, and the energizing member 147 energizes the valve element 146 .
- the valve element 146 connects and shuts off the pressure chamber 180 and the passage 143 .
- the plunger 144 connects and shuts off the passage 143 and the exhaust passage 161 .
- a shaft member 166 is operably provided with respect to the body part 106 .
- the shaft member 166 is connected to the push lever 134 .
- a guide member 150 is provided in the housing 101 , and the guide member 150 holds a transmission member 194 .
- the shaft member 166 and the transmission member 194 operate along the center line A 5 .
- An energizing member 165 is provided between the valve body 145 and the transmission member 194 .
- the energizing member 165 is, as an example, a metal spring.
- An energizing force of the energizing member 165 is transmitted to the shaft member 166 via the transmission member 194 .
- the energizing member 165 energizes the transmission member 194 and the shaft member 166 in a direction away from the trigger valve 105 .
- a stopper 203 is provided on the housing 101 , and the shaft member 166 pressed by the energizing member 165 contacts with the stopper 203 and stops. When the push lever 134 is pressed against the workpiece W 1 and operates, an operating force of the push lever 134 is transmitted to the shaft member 166 .
- the shaft member 166 operates against the energizing force of the energizing member 165 .
- An operating force of the shaft member 166 is transmitted to the plunger 144 and the transmission member 194 .
- the transmission member 194 contacts with an arm 177 , the arm 177 operates.
- the trigger 148 is operably attached to the housing 101 about a support shaft 149 .
- the arm 177 is attached to the trigger 148 via a support shaft 178 .
- the arm 177 is rotatable about the support shaft 178 as a fulcrum.
- An elastic member 179 is provided, and the elastic member 179 energizes the arm 177 and the trigger 148 .
- the arm 177 and the trigger 148 which are energized by the elastic member 179 , contact with the guide member 150 and stop at an initial position.
- the trigger valve 105 has a cylindrical guide part 151 , a ball-shaped valve element 155 , a plunger 157 , a body 158 , and an energizing member 191 .
- the guide part 151 has a passage 152 , and the passage 152 connects to the pressure chamber 180 .
- a shaft 159 is connected to the valve element 155 .
- a shaft hole 160 penetrating the handle 107 is provided, and an end portion of the shaft 159 is arranged in the shaft hole 160 .
- the shaft 159 and the valve element 155 are operable in a direction along a center line A 4 .
- the plunger 157 has a flange 162 , and a sealing member 163 is attached to an outer peripheral surface of the flange 162 .
- An air chamber 164 is formed between the flange 162 and the body 158 .
- a sealing member 204 is provided on the body 158 , and the sealing members 163 and 204 seal the air chamber 164 .
- the body part 106 has a passage 190 connecting to the air chamber 164 .
- the energizing member 191 energizes the plunger 157 in a direction away from the valve element 155 .
- the energizing member 191 is, as an example, a metal spring.
- the plunger 157 is energized by pressure in the air chamber 164 in a direction of approaching the valve element 155 against the energizing force of the energizing member 191 .
- a passage 192 connects to the accumulator 110 .
- a valve 75 and a solenoid 76 are provided in the housing 101 .
- the plunger 77 operates by the energizing force of the energizing member 86 , and the valve 75 is stopped in an initial state.
- the valve 75 in the initial state connects the passage 190 and the exhaust passage 82 , and shuts off the passage 192 and the passage 190 . Therefore, the air chamber 164 connects to the exterior D 1 via the passage 190 and the exhaust passage 82 . Accordingly, the pressure in the air chamber 164 becomes atmospheric pressure.
- the driving tool 100 has a configuration shown in FIG. 7 .
- a user can operate a mode selection lever 92 to mutually switch a first mode, a second mode, and a third mode.
- the mode selection lever 92 is operable about an operating shaft 92 A with respect to the housing 101 , that is, is rotatably attached to the housing 101 .
- a support shaft 149 is provided on the operating shaft 92 A.
- the support shaft 149 is provided at a position eccentric from a rotation center X 1 shown in FIG. 14 .
- the rotation center X 1 is a rotation center of the operating shaft 92 A.
- a position of the support shaft 149 in the first mode is a position farthest from the plunger 157 .
- a position of the support shaft 149 in the third mode is a position closest to the plunger 157 .
- a position of the support shaft 149 in the second mode is between the position of the support shaft 149 in the first mode and the position of the support shaft 149 in the third mode.
- a position of the support shaft 149 is a position in the direction intersecting with the center line A 4 .
- the arm 177 is pressed against the plunger 157 and the plunger 157 operates.
- the arm 177 is maintained in a state of separating from the plunger 157 .
- the push lever valve 104 When the user separates the push lever 134 from the workpiece W 1 , the push lever valve 104 is stopped in the initial state.
- the plunger 144 stops at the initial position and opens the exhaust passage 161 .
- the valve element 146 stops at the initial position and shuts off the pressure chamber 180 and the passage 143 .
- the exhaust valve chamber 114 and the second gas chamber 142 connect to the exterior D 1 via the passages 200 and 143 and the exhaust passage 161 .
- the cylinder 109 stops at an initial position where it is pressed against the valve seat 119 as shown in FIG. 9 .
- the cylinder 109 stopping in the initial position shuts off the accumulator 110 and the piston upper chamber 120 .
- the exhaust valve 118 stops at the initial position.
- the exhaust valve 118 stopping at the initial position opens the exhaust passage 117 as shown in FIG. 9 .
- the piston upper chamber 120 is the same as atmospheric pressure, and the striking part 103 stops at a top dead center.
- the transmission member 194 stops at an initial position shown in FIG. 12 .
- the support shaft 149 stops at an operating position closest to the plunger 157 . Therefore, even if the operating force is applied to the trigger 148 and the push lever 134 is pressed against the workpiece W 1 to operate the transmission member 194 , the transmission member 194 separates from the arm 177 . That is, the arm 177 does not transmit the operating force of the push lever 134 and the operating force of the trigger 148 to the plunger 157 .
- the microcomputer 89 turns off the switch 90 when the third mode is selected and the operating force to the trigger 148 is released to separate the push lever 134 from the workpiece W 1 . Accordingly, the valve 75 is stopped in a discharge state.
- the trigger valve 105 is stopped in the initial state shown in FIG. 12 .
- the trigger valve 105 stopped in the initial state causes the valve element 155 to shut off the accumulator 110 and the passage 152 .
- the microprocessor 89 starts the timer when the operating force to the trigger 148 is applied.
- the microcomputer 89 turns on the switch 90 when the push lever 134 is pressed against the workpiece W 1 within a predetermined time from a time point when the operating force is applied to the trigger 148 . Therefore, the valve 75 switches from the discharge state of FIG. 12 to the supply state of FIG. 13 .
- the pressure in the air chamber 164 becomes higher than the atmospheric pressure and the trigger valve 105 switches from the initial state to the operating state.
- the plunger 157 operates by the pressure in the air chamber 164 against the force of the energizing member 191 .
- the plunger 157 is pressed against the valve element 155 , the valve element 155 operates against the force of the accumulator 110 , and the valve element 155 connects the accumulator 110 and the passage 152 . Therefore, the compressed air in the accumulator 110 is supplied to the pressure chamber 180 through the passage 152 .
- the operating force of the push lever 134 is transmitted to the plunger 144 via the shaft member 166 as shown in FIG. 13 .
- the plunger 144 operates against the force of the energizing member 165 , and the plunger 144 shuts off the passage 143 and the exhaust passage 161 .
- the plunger 144 is pressed against the valve element 146 , the valve element 146 operates against the force of the energizing member 147 , and the valve element 146 stops at an operating position.
- the valve element 146 stopping at the operating position connects the pressure chamber 180 and the passage 143 .
- compressed air is supplied from the pressure chamber 180 to the exhaust valve chamber 114 and the second gas chamber 142 through the passages 143 and 200 .
- a state where the push lever valve 104 shuts off the passage 143 and the exhaust passage 161 and connects the pressure chamber 180 and the passage 143 is the operating state of the push lever valve 104 .
- the exhaust valve 118 operates to close the exhaust passage 117 .
- the cylinder 109 operates against the force of the energizing member 130 , and the cylinder 109 separates from the valve seat 119 . Therefore, the accumulator 110 and the piston upper chamber 120 are connected to each other, and the pressure in the piston upper chamber 120 rises.
- the striking part 103 descends from the top dead center toward the bottom dead center at the pressure in the piston upper chamber 120 .
- the driver blade 122 hits the fastener 202 in the ejection path 133 , and the fastener 202 is driven into the workpiece W 1 .
- the piston 121 collides with the bumper 128 .
- a position of the striking part 103 at a time point when the piston 121 collides with the bumper 128 is the bottom dead center. Further, while the striking part 103 is descending, the pressure in the piston lower chamber 123 rises.
- the plunger 144 operates by the force of the energizing member 165 and connects the passage 143 and the exhaust passage 161 . Further, the valve element 146 operates by the force of the energizing member 147 to shut off the pressure chamber 180 and the passage 143 . In this way, when the push lever valve 104 returns from the operating state to the initial state, the exhaust valve chamber 114 becomes atmospheric pressure. Further, the cylinder 109 operates by the force of the energizing member 130 , is pressed against the valve seat 119 , and is stopped in the initial state.
- the cylinder 109 stopped in the initial state shuts off the accumulator 110 and the piston upper chamber 120 , and opens the exhaust passage 117 . Consequently, the striking part 103 rises by the pressure in the piston lower chamber 123 , and the striking part 103 stops at the time point when the piston 121 contacts with the valve seat 119 .
- the microcomputer 89 detects that the push lever 134 is separated from the workpiece W 1 , it turns off the switch 90 . Consequently, the valve 75 switches from the supply state to the discharge state. Therefore, the air in the air chamber 164 is discharged to an exterior D 1 .
- the plunger 46 of the trigger valve 105 operates by the emerging force of the energizing member 65 , and the plunger 146 is stopped in the initial state shown in FIG. 9 .
- the valve element 48 operates by the energizing force of the energizing member 65 , connects the accumulator 21 and the passage 52 , and shuts off the passage 52 and the exhaust passage 56 . In this way, the trigger valve 105 switches from the operating state to the initial state.
- the user selects the third mode, and performs an operation of pressing the push lever 134 against the workpiece W 1 within a predetermined time with the operating force applied to the trigger 148 , so that the user can sequentially drive the fasteners 202 .
- the microcomputer 89 continues to turn off the switch 90 when a predetermined time has elapsed from the time point of applying the operating force to the trigger 148 in the state of separating the push lever 134 from the workpiece W 1 . Therefore, when the push lever 134 is pressed against the workpiece W 1 after the predetermined time has elapsed from the time point of applying the operating force to the trigger 148 , the trigger valve 105 maintains the initial state. That is, the striking part 103 stops at the top dead center and does not operate. The microprocessor 89 resets the timer once the user releases the operating force to the trigger 148 . That is, the flowchart of FIG. 8 also applies to the driving tool 100 .
- the driving tool 100 switches the trigger valve 105 between the initial state and the operating state. Switching between the initial state and the operating state of the trigger valve 105 is performed by pressure due to the compressed air in the accumulator 110 .
- the solenoid 76 only controls the operation of the plunger 77 of the valve 75 . Accordingly, the driving tool 100 can obtain the same effect as that of the driving tool 10 .
- the end portion 159 A of the shaft 159 is arranged at a position where it receives atmospheric pressure, and is exposed to the exterior D 1 . Therefore, when the shaft 159 is operated, an area that receives the pressure in the accumulator 110 can be narrowed. Accordingly, the operating force for switching the trigger valve 105 from the initial state to the operating state can be reduced.
- the microcomputer 89 When the user selects the first mode, the microcomputer 89 is stopped. When the user selects the first mode and the user releases the operating force to the trigger 148 to separate the push lever 134 from the workpiece W 1 , the arm 177 is separated from the plunger 157 as shown in FIG. 14 . That is, the trigger valve 105 maintains the initial state. Further, when the user selects the first mode and the operating force is applied to the trigger 148 to separate the push lever 134 from the workpiece W 1 , the trigger valve 105 maintains the initial state. The user selecting the first mode, and the push lever 134 is pressed against the workpiece W 1 with the operating force applied to the trigger 148 . Consequently, the operating force of the push lever 134 is transmitted to the plunger 144 via the shaft member 166 , and the push lever valve 104 switches from the initial state to the operating state.
- the operating force of the shaft member 166 is transmitted to the transmission member 194 , and the operating force of the transmission member 194 is transmitted to the plunger 157 via the arm 177 as shown in FIG. 15 . Therefore, the trigger valve 105 switches from the initial state to the operating state. Accordingly, the compressed air in the accumulator 110 is supplied to the piston upper chamber 120 , and the striking part 103 descends.
- the plunger 144 operates by the energizing force of the energizing member 165 . Therefore, the push lever valve 104 switches from the operating state to the initial state. Accordingly, the striking part 103 rises, and the striking part 103 stops at the top dead center.
- the user selects the first mode, and can repeat more than once the operation of pressing the push lever 134 against the workpiece W 1 and the operation of separating the push lever 134 from the workpiece W 1 in the state where the operating force is applied to the trigger 148 .
- the arm 177 When the user selects the second mode and the operating force is applied to the trigger 148 with the push lever 134 pressed against the workpiece W 1 , the arm 177 operates about the transmission member 194 as a fulcrum as shown in FIG. 15 and the arm 177 is pressed against the plunger 157 and the trigger valve 105 switches from the initial state to the operating state. Therefore, the striking part 103 decreases descends.
- the trigger valve 105 switches from the operating state to the initial state. Therefore, the striking part 103 rises, and the striking part 103 stops at the top dead center.
- the user can repeat more than once the operation of applying the operating force to the trigger 148 and the operation of separating the push lever 134 from the workpiece W 1 to release the operating force to the trigger 148 in the state where the push lever 134 is pressed against the workpiece W 1 .
- various sensors 94 can be provided in the housing 101 .
- the various sensors 94 include at least one or more of a pressure sensor, a temperature sensor, a humidity sensor, and an acceleration sensor.
- the microcomputer 89 processes signals of the various sensors 94 and the microcomputer 89 can display on the display unit and warn: an operating time from the operation of the user to the operation of the striking part 103 ; operating speed of the striking part 103 ; and an inspecting and repairing time of the bumper 128 .
- the driving tools 10 and 100 are examples of driving tools.
- the accumulators 21 and 110 are examples of a gas accommodating chamber.
- the piston upper chambers 32 and 120 are examples of pressure chambers.
- the striking parts 13 and 103 are examples of striking parts.
- the fasteners 72 and 202 are examples of fasteners.
- the triggers 14 , 148 and the push levers 16 , 134 are examples of operating members.
- the push levers 16 and 134 are examples of contact members.
- the trigger valves 45 and 105 are examples of switching mechanisms. Each initial state of the trigger valves 45 and 105 is an example of a first state. Each operating state of the trigger valves 45 and 105 is an example of a second state.
- the first mode and the second mode are examples of connection modes.
- the third mode is an example of a shut-off mode or a magnetic valve mode.
- the mode selection lever 92 , the trigger 14 , and the arm 42 are examples of mode switching mechanisms.
- the mode selection lever 92 , the trigger 148 , and the arm 177 are examples of mode switching mechanisms.
- the valve 75 is an example of a valve.
- the supply state of the valve 75 is an example of a supply state.
- the discharge state of the valve 75 is an example of a discharge state.
- the solenoid 76 is an example of an actuator.
- the plungers 46 and 157 and the valve element 155 are examples of a first operating member.
- the gas chambers 68 and 164 are examples of a gas chamber.
- the plunger 77 is an example of a second operating member.
- the trigger switch 87 , the push lever switch 88 , and the microcomputer 89 are examples of detectors.
- the microcomputer 89 and the switch 90 are examples of controllers.
- a processing in which the microcomputer 89 proceeds from step S 4 to step S 5 in FIG. 8 is an example of first control.
- a processing in which the microcomputer 89 proceeds from step S 4 to step S 7 in FIG. 8 is an example of second control.
- the driving tool is not limited to the disclosed embodiments, and can be variously changed without departing from the gist thereof.
- the gas is compressible gas, and includes inert gas such as nitrogen gas and noble gas besides air.
- a current of the power supply 91 may flow through the microcomputer 89 to start the microcomputer 89 .
- a mode detection sensor 93 is provided.
- the mode detection sensor 93 detects the mode selected by operating the mode selection lever 92 and outputs a signal.
- the microcomputer 89 can turn on the switch 90 when it detects that the third mode has been selected.
- the microcomputer 89 keeps the switch 90 off when it detects that the first mode or the second mode has been selected.
- the actuator is a mechanism in which a current flows to operate the plunger 77 of the valve 75 against the force of the energizing member 86 .
- an electric motor and a rack and pinion mechanism can be used instead of the solenoid 76 .
- the electric motor rotates when a current is supplied, and stops when the current is shut off.
- the rack and pinion mechanism converts a rotation force of the electric motor into the operating force of the plunger 77 of the valve 75 .
- the operating member includes a lever, a button, an arm and the like.
- the operation of the operating member may be either a rotational operation within a predetermined angle range or a linear reciprocating operation.
- the controller may be a single electric component or electronic component, or may be a unit having a plurality of electric components or a plurality of electronic components.
- Electrical or electronic components include a processor, a control circuit, and a module.
- the pressure chamber and the air chamber include spaces, areas and passages where a gas is supplied and discharged.
- a path for supplying the gas to the pressure chamber includes a port, a passage, a hole, and a gap.
- the first mode can be defined as a continuous mode
- the second mode can be defined as a single mode.
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Abstract
Provided a driving tool capable of reducing power supplied to an actuator. It includes: an accumulator 21 accommodating a gas; a pressure chamber to which the gas is supplied from the accumulator 21; a striking part operating by pressure in the pressure chamber; a trigger valve 45 having an initial state of shutting off the accumulator 21 and the pressure chamber, and an operating state of connecting the accumulator 21 and the pressure chamber; a mode switching mechanism having a connection mode of transmitting to the trigger valve 45 an operating force applied to the operating member, and a shut-off mode of preventing the operating force applied to the operating member being transmitted to the trigger valve 45; a valve 75 having, when the mode switching mechanism is in the shut-off mode, a supply state of supplying a gas in the accumulator 21 to the trigger valve 45 to make the trigger valve 45 an operating state, and a discharge state of discharging the gas supplied to the trigger valve 45 to make the trigger valve 45 an initial state; and a solenoid 76 switching the supply state and the discharge state of the valve 75.
Description
- The present invention relates to a driving tool including a striking part and a driving part for operating the striking part.
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Patent Document 1 discloses an example of a driving tool including a striking part and a driving part for operating the striking part. The driving tool disclosed inPatent Document 1 has a motor, a magazine, a flywheel, a rotating shaft, the striking part, a coil spring, a clutch mechanism, a solenoid as an actuator, a trigger, and a push lever. Fasteners accommodated in the magazine are sent to a hitting position. Rotational energy of the motor is stored in the flywheel. - When an operating force to the trigger is released or applied or when the push lever is separated from a workpiece, a supply of power to the solenoid is stopped. When the supply of power to the solenoid is stopped, the clutch mechanism shuts off the flywheel and the rotating shaft.
- When the operating force is applied to the trigger and the push lever is pressed against the workpiece, power is supplied to the solenoid. When the power is supplied to the solenoid, the clutch mechanism connects the flywheel to the rotating shaft. When the flywheel and the rotating shaft are connected, the striking part operates and the striking part hits the fastener at the hitting position.
- Patent Document 1: Japanese Patent Application Laid-open No. 2007-118134
- The inventor of the present application has recognized a problem in which the power supplied to the actuator increases since the clutch mechanism is operated by supplying the power to the actuator.
- An object of the present invention is to provide a driving tool capable of reducing the power supplied to the actuator.
- A driving tool of one embodiment includes: a gas accommodating chamber accommodating a gas; a pressure chamber to which the gas is supplied from the gas accommodating chamber; a striking part operating in a direction of hitting a fastener by pressure in the gas supplied to the gas accumulating chamber; an operating member to and from which an operating force of a user is applied and released; a switching mechanism having a first state of shutting off the gas accommodating chamber and the pressure chamber when an operating force to the operating member is released, and a second state of connecting the gas accommodating chamber and the pressure chamber when the operating force to the operating member is applied; a mode switching mechanism having a connection mode of transmitting to the switching mechanism the operating force applied to the operating member, and a shut-off mode of preventing the operating force applied to the operating member being transmitted to the switching mechanism; a valve having, when the mode switching mechanism is in the shut-off mode, a supply state of supplying the gas in the gas accommodating chamber to make the switching mechanism to the switching mechanism the second state, and a discharge state of discharging the gas supplied to the switching mechanism to make the switching mechanism the first state; and an actuator operating by a supply of power and switching the supply state and the discharge state of the valve.
- The driving tool of one embodiment can reduce the power supplied to the actuator.
-
FIG. 1 is an overall cross-sectional view showing a first embodiment of a driving tool included in the present invention; -
FIG. 2 is a cross-sectional view of the driving tool ofFIG. 1 in which an operating force is applied to a trigger in a first mode and a striking part is located at a bottom dead center in a state where a push lever contacts with a workpiece; -
FIG. 3 is a cross-sectional view of the driving tool ofFIG. 1 in which an operating force is applied to the trigger in the first mode and the striking part is located at atop dead center in a state where the push lever contacts with the workpiece; -
FIG. 4 is a cross-sectional view showing initial states of a trigger valve and a valve when a third mode is selected by the driving tool ofFIG. 1 ; -
FIG. 5 is a cross-sectional view showing operating states of the trigger valve and the valve when the third mode is selected by the driving tool ofFIG. 1 ; -
FIGS. 6(A) and (B) are cross-sectional views each showing a state of the trigger valve in a state where the first mode is selected; -
FIG. 7 is a block diagram showing a control system of the driving tool; -
FIG. 8 is a flowchart of a control example in the third mode; -
FIG. 9 is an overall cross-sectional view showing a second embodiment of the driving tool; -
FIG. 10 is a cross-sectional view of the driving tool ofFIG. 9 in which a third mode is selected to apply an operating force to a trigger and a striking part is located at a bottom dead center in a state where a push lever contacts with a workpiece; -
FIG. 11 is a cross-sectional view of the driving tool ofFIG. 9 in which the third mode is selected to apply the operating force to the trigger and the striking part located at a top dead center in the state where the push lever contacts with the workpiece; -
FIG. 12 is a cross-sectional view of the driving tool ofFIG. 9 in which the third mode is selected to apply the operating force to the trigger and a valve is in a discharge state in the state where the push lever contacts with the workpiece; -
FIG. 13 is a cross-sectional view of the driving tool ofFIG. 9 in which the third mode is selected to apply the operating force to the trigger and the valve is in a supply state in the state where the push lever contacts with the workpiece; -
FIG. 14 is a cross-sectional view of the driving tool ofFIG. 9 in which the third mode is selected and the trigger valve and the push lever valve are in initial states; and -
FIG. 15 is a cross-sectional view of the driving tool ofFIG. 9 in which the third mode is selected and the trigger valve and the push lever valve are in operating states. - Next, a typical one among some embodiments included in a driving tool of the present invention will be described with reference to the drawings.
- (First Embodiment) A first embodiment of a driving tool will be described with reference to the drawings. A
driving tool 10 shown inFIGS. 1, 2, and 3 has ahousing 11, acylinder 12, astriking part 13, atrigger 14, anejection part 15, and apush lever 16. Further, amagazine 17 attached to thedriving tool 10 is provided. Thehousing 11 has acylindrical body part 18, ahead cover 19 fixed to thebody part 18, and ahandle 20 connected to thebody part 18. Anaccumulator 21 is formed over an inside of thehandle 20, an inside of thebody part 18, and an inside of thehead cover 19. An air hose is connected to thehandle 20. Compressed air as a gas is supplied to theaccumulator 21 via the air hose. Acylinder 12 is provided in thebody part 18. - A
head valve 22 is provided in thehead cover 19. Thehead valve 22 is movable in a direction along a center line A1 of thecylinder 12. Thehead valve 22 is made of synthetic rubber as an example. Thehead valve 22 is energized in a direction away from thecylinder 12 by air pressure in theaccumulator 21. Agas chamber 24 is formed between thehead valve 22 and thehead cover 19. Astopper 25 is attached to thehead cover 19. Anexhaust passage 26 is formed between thehead cover 19 and thestopper 25. Theexhaust passage 26 is connected to an exterior B1 of thehousing 11. - An energizing
member 27 is provided between thehead valve 22 and thestopper 25. Theenergizing member 27 is, as an example, a metal spring. The energizingmember 27 energizes thehead valve 22 in a direction along the center line A1 so as to approach thecylinder 12. Thecylinder 12 is positioned and fixed with respect to thebody part 18 in the direction along the center line A1. Aholder 28 is provided in thebody part 18. Theholder 28 positions thecylinder 12 with respect to thebody part 18 in a direction intersecting with the center line A1. - The
striking part 13 has apiston 29 and adriver blade 30. Thepiston 29 is arranged in thecylinder 12, and thestriking part 13 is operable in the direction along the center line A1. A sealingmember 31 is attached to thepiston 29. A pistonupper chamber 32 is formed between thehead valve 22 and thepiston 29. - The
ejection part 15 is fixed to thebody part 18 at an end portion opposite to a portion where thehead cover 19 is provided in the direction along the center line A1. Abumper 33 is provided in thebody part 18. Thebumper 33 is arranged in thebody part 18 at a position closest to theejection part 15. Thebumper 33 is made of synthetic rubber or silicon rubber. Thebumper 33 has ashaft hole 34, and thedriver blade 30 is movable in theshaft hole 34 in the direction along the center line A1. - A piston
lower chamber 35 is formed between thepiston 29 and thebumper 33 in thecylinder 12. The sealingmember 31 airtightly shuts off the pistonlower chamber 35 and the pistonupper chamber 32. Thecylinder 12 haspassages passage 37 is arranged between thepassage 36 and theejection part 15 in the direction along the center line A1. Areturn air chamber 38 is formed between thecylinder 12 and thebody part 18. Theholder 28 airtightly separates thereturn air chamber 38 and theaccumulator 21. Acheck valve 39 is attached to an outer peripheral surface of thecylinder 12. Thecheck valve 39 opens and closes thepassage 36. Thepassage 37 always connects the pistonlower chamber 35 and thereturn air chamber 38. Air is present in the pistonlower chamber 35 and thereturn air chamber 38. - The
trigger 14 is attached to thehousing 11. Thetrigger 14 is rotatable about asupport shaft 40 with respect to thehousing 11 within a predetermined angle range. Thehousing 11 has astopper 41, and thestopper 41 prevents an operating range of thetrigger 14. Anarm 42 is attached to thetrigger 14. Thearm 42 is operable with respect to thetrigger 14 about thesupport shaft 43. An energizingmember 44 is provided between thearm 42 and thehousing 11. The energizingmember 44 energizes thetrigger 14 and thearm 42 in a direction away from thehandle 20. The energizingmember 44 is, as an example, a metal spring. Thetrigger 14 and thearm 42, which are energized by a force of the energizingmember 44, contact with thestopper 41 and respectively stop as shown inFIG. 1 . - As shown in
FIGS. 4 and 5 , atrigger valve 45 is provided at a connection portion between thebody part 18 and thehandle 20. Thetrigger valve 45 includes aplunger 46, abody 47, avalve element 48, and an energizingmember 65. Thebody 47 has anaccommodation recess portion 50 and a shaft hole 51. The shaft hole 51 and theaccommodation recess portion 50 connect to each other. An opening of theaccommodation recess portion 50 is connected to theaccumulator 21. Thevalve element 48 has a cylindrical shape, and thevalve element 48 is arranged in theaccommodation recess portion 50. Thevalve element 48 is operable in the direction along the center line A2 with respect to thebody 47. The center line A2 is each center of thevalve element 48 and theplunger 46. Theplunger 46 is arranged over theaccommodation recess portion 50, the shaft hole 51, and the exterior B1 of thehousing 11. Theplunger 46 is operable in the direction along the center line A2 with respect to thebody 47 and thevalve element 48. - A
passage 52 is provided in thebody 47, and thepassage 52 is connected to thegas chamber 24 via thepassage 53. Further, thehousing 11 has apassage 54, and thepassage 54 connects theaccumulator 21 and theaccommodation recess portion 50. A sealingmember 55 is provided to seal a portion between thebody 47 and thehousing 11. Thebody 47 has anexhaust passage 56, and theexhaust passage 56 connects to the exterior B1. Theexhaust passage 56 connects to theaccommodation recess portion 50. Aspace 57 is formed between thevalve element 48 and thebody 47. Thespace 57 connects to the shaft hole 51. Thevalve element 48 is energized by pressure in thespace 57 in a direction of approaching theaccumulator 21. -
Sealing members valve element 48. Thevalve element 48 has ashaft hole 61. The sealingmember 60 shuts off thespace 57 and theexhaust passage 56. Theplunger 46 is arranged over the shaft hole 51 and theshaft hole 61.Sealing members plunger 46. Aflange 79 projecting from the outer peripheral surface of theplunger 46 is provided. The energizingmember 65 is provided in theshaft hole 61. The energizingmember 65 is, as an example, a metal compression spring, and the energizingmember 65 energizes theplunger 46 in a direction along a center line A2 so as to approach thearm 42. Further, the energizingmember 65 energizes thevalve element 48 in a direction of approaching theaccumulator 21. - In the
plunger 46, aland portion 67 is provided between theflange 79 and afirst end portion 66. Thefirst end portion 66 is a position closest to thearm 42 in the direction along the center line A2 of theplunger 46. Agas chamber 68 is formed between an end surface of theland portion 67 and thebody 47 in the shaft hole 51. Two sealingmembers 95 are attached to thebody 47, and the two sealingmembers 95 airtightly seal thegas chamber 68. Further, thebody 47 has anexhaust passage 96, and theexhaust passage 96 connects the shaft hole 51 and the exterior B1. - A
shaft hole 69 is provided in thehousing 11, and asecond end portion 70 of theplunger 46 is arranged in theshaft hole 69. Thesecond end portion 70 is located in the direction along the center line A2 and opposite thefirst end portion 66. Thesecond end portion 70 is movable in theshaft hole 69 in the direction along the center line A2. Theshaft hole 69 connects to the exterior B1 of thehousing 11. Thesecond end portion 70 is exposed to the exterior B1. Theejection part 15 is, as an example, made of metal or non-ferrous metal. Theejection part 15 has anejection path 71. The center line A1 is located in theejection path 71, and thedriver blade 30 is movable in the direction along the center line A1 in theejection path 71. Themagazine 17 is fixed to theejection part 15. Themagazine 17 accommodatesfasteners 72. Themagazine 17 has a feeder, and the feeder sends thefasteners 72 in themagazine 17 to theejection path 71. - A
shaft member 74 connected to thepush lever 16 is provided. Theshaft member 74 is movable with respect to thestopper 41. Theshaft member 74 is energized by the energizingmember 97 in a direction away from thearm 42. The energizingmember 97 is, as an example, a compression spring. Further, avalve 75 is provided in thehousing 11. Thevalve 75 has aplunger 77 and asupport hole 78. Thesupport hole 78 is provided in thehousing 11, and theplunger 77 is arranged in thesupport hole 78. Theplunger 77 is made of metal, i.e., iron or an aluminum alloy as an example. Theplunger 77 is operable in a direction along a center line A3. - Further, a
solenoid 76 is provided as an actuator for operating thevalve 75. Thesolenoid 76 forms a magnetic attraction force when a current flows. Thesolenoid 76 releases the magnetic attraction force when no current flows. Theplunger 77 is connected to thesolenoid 76 and is operable by the magnetic attraction force. Thehousing 11 haspassages exhaust passage 82, and thepassage 80 connects to theaccumulator 21 and is open to thesupport hole 78. Thepassage 81 connects to thegas chamber 68 and is open to thesupport hole 78. Theexhaust passage 82 connects to the exterior B1 and is open to thesupport hole 78.Sealing members plunger 77. An emergingmember 86 is provided in thesupport hole 78. The energizingmember 86 energies theplunger 77 in the direction along the center line A3. The energizingmember 86 is, as an example, a metal spring. Theplunger 77 operates by the magnetic attraction force of thesolenoid 76 and an energizing force of the energizingmember 86. - The
plunger 77 stops at an initial position when the sealingmember 84 is pressed against an inner surface of thesupport hole 78 as shown inFIG. 4 . In thevalve 75, when theplunger 77 stops at the initial position, the sealingmember 84 shuts off thepassage 80 and thepassage 81. Further, thevalve 75 connects thepassage 81 and theexhaust passage 82. When thesolenoid 76 forms the magnetic attraction force, theplunger 77 operates against the energizing force of the energizingmember 86. Theplunger 77 stops at an operating position where the sealingmember 84 is separated from the stopper as shown inFIG. 5 . Theplunger 77 stops at the operating position. When theplunger 77 stops at the operating position, the sealingmember 85 shuts off thepassage 81 and theexhaust passage 82. Further, thevalve 75 connects thepassage 80 and thepassage 81. -
FIG. 7 is a block diagram showing a control system of the drivingtool 10. Atrigger switch 87 is provided in thehousing 11, and thetrigger switch 87 detects application and release of the operating force to and from thetrigger 14, and outputs a signal. - The
trigger switch 87 may be either a contact type sensor or a non-contact type sensor. Apush lever switch 88 is provided in thehousing 11, and thepush lever switch 88 detects whether thepush lever 16 is pressed against the workpiece W1 or thepush lever 16 is separated from the workpiece W1, and outputs a signal. Thepush lever switch 88 may be either a contact type sensor or a non-contact type sensor. - A
microcomputer 89 is provided in thehousing 11 as an example. The microcomputer includes an arithmetic processing unit, a memory, and a timer. Themicrocomputer 89 processes the signal of thetrigger switch 87 and the signal of thepush lever switch 88. Apower supply 91 connected to thevalve 75 via aswitch 90 is provided. As thepower supply 91, at least one of a solar panel, a DC power supply, an AC power supply, a capacitor, and the like can be used. The solar panel is a panel for generating electricity with sunlight, and the solar panel can be provided on an outer surface of thehousing 11. The DC power supply may be either a primary battery or a secondary battery, and the DC power supply is provided in thehousing 11 or themagazine 17 as an example. The capacitor is a passive element that stores and releases electric charges. The capacitors can also be defined as capacitors. The capacitor can be provided in thehousing 11 or themagazine 17 as an example. The AC power supply is connected to thehousing 11 via a power cable. The power cable can also be attached to an air hose connected to thehandle 20. - A
mode selection lever 92 shown inFIG. 1 is attached to thehousing 11. Themode selection lever 92 is provided so as to be operable to thehousing 11 about an operatingshaft 92A, that is, to be rotatable. A user can operate themode selection lever 92 to mutually switch any one of a first mode, a second mode, and a third mode. Thesupport shaft 40 is provided on the operatingshaft 92A and is provided at a position eccentric from a rotation center X1 of the operatingshaft 92A. When themode selection lever 92 is operated, thesupport shaft 40 revolves as shown inFIG. 6(A) . - A position of the
support shaft 40 in the first mode is a position farthest from theplunger 46. A position of thesupport shaft 40 in the third mode is a position closest to theplunger 46. A position of thesupport shaft 40 in the second mode is between the position of thesupport shaft 40 in the first mode and the position of thesupport shaft 40 in the third mode. The position of thesupport shaft 40 is a position in a direction intersecting with the center line A2. Therefore, when the mode is switched, thearm 42 operates in the direction intersecting with the center line A2 regardless of whether an operating force is applied to thetrigger 14. - The
switch 90 forms part of an electrical circuit between thepower supply 91 and thesolenoid 76. Themicrocomputer 89 controls on and off of theswitch 90. When themicrocomputer 89 turns off theswitch 90, no current is supplied from thepower supply 91 to thesolenoid 76. When themicrocomputer 89 turns on theswitch 90, a current is supplied from thepower supply 91 to thesolenoid 76. The user selects the first mode before pressing thepush lever 16 against the workpiece W1 to use thedriving tool 10 while applying the operating force to thetrigger 14. - The user selects the second mode before applying an operating force to the
trigger 14 to use thedriving tool 10 while pressing thepush lever 16 against the workpiece W1. When themicrocomputer 89 detects the first mode or the second mode, themicrocomputer 89 turns off theswitch 90. The user can select the third mode before pressing thepush lever 16 against the workpiece W1 to use thedriving tool 10 while applying the operating force to thetrigger 14. When themicrocomputer 89 detects the third mode, themicrocomputer 89 can turn on theswitch 90. - Further, a
power switch 98 for switching on and off when themode selection lever 92 is operated is provided. Thepower switch 98 is turned off when the first mode or the second mode is selected, and is turned on when the third mode is selected. When thepower switch 98 is turned off, no current is supplied from thepower supply 91 to themicrocomputer 89 and themicrocomputer 89 is stopped. When thepower switch 98 is turned on, a current is supplied from thepower supply 91 to themicrocomputer 89 and themicrocomputer 89 is started. Incidentally,various sensors 94 may be provided in thehousing 11. Thevarious sensors 94 include at least one or more of a pressure sensor, a temperature sensor, a humidity sensor, and an acceleration sensor. If thehousing 11 is provided with a display unit, themicrocomputer 89 processes signals ofvarious sensors 94 and can display or warn, on the display unit, an operating time from an operation of the user to an operation of thestriking part 13, operating speed of thestriking part 13, and inspection timing and repair timing of thebumper 33. - Next, an example in which the user uses the
driving tool 10 will be described for each mode selected by the user. - (Example in which User selects Third Mode) When the user selects the third mode, the
arm 42 separates from theplunger 46 even if the user applies the operating force to thetrigger 14 and presses thepush lever 16 against the workpiece W1. Thearm 42 does not transmit the operating force of thetrigger 14 and the operating force of thepush lever 16 to theplunger 46. Therefore, thetrigger valve 45 maintains an initial state. Themicrocomputer 89 switches a state of thetrigger valve 45 by processing a signal of thetrigger switch 87 and a signal of thepush lever switch 88 to control supply and stop of the current to and from thesolenoid 76. - When the
microcomputer 89 detects that the operating force to thetrigger 14 is released and thepush lever 16 separates from the workpiece W1, themicrocomputer 89 turns off theswitch 90. Further, when themicrocomputer 89 detects that the operating force is applied to thetrigger 14 and thepush lever 16 separates from the workpiece W1, themicrocomputer 89 turns off theswitch 90. When themicrocomputer 89 turns off theswitch 90, no current flows through thesolenoid 76. Therefore, as shown inFIG. 4 , thevalve 75 is in a discharge state in which thegas chamber 68 and theexhaust passage 82 are connected and theaccumulator 21 and thepassage 81 are shut off. Further, thetrigger valve 45 is in the initial state. As shown inFIG. 4 , theflange 79 is pressed against thebody 47 by the energizingmember 65. The sealingmember 64 shuts off thespace 57 and theexhaust passage 96. Thevalve element 48 is energized in the direction away from thearm 42 by the energizing force of the energizingmember 65, and the sealingmember 59 is pressed against thebody 47 to cause thevalve element 48 to stop at the initial position. - The sealing
member 59 shuts off thepassage 52 and theexhaust passage 56. The sealing member 58 separates from thebody 47, and theaccumulator 21 is connected to thegas chamber 24 via thepassage 52 and thepassage 53. The sealingmember 62 separates from thevalve element 48, and theaccumulator 21 connects to thespace 57 via theshaft hole 61. The sealingmember 64 shuts off thespace 57 and the exterior B1. - When the
trigger valve 45 is in the initial state, compressed air in theaccumulator 21 is supplied to thegas chamber 24. Therefore, thehead valve 22 is stopped in the initial state shown inFIG. 1 . Thehead valve 22 stopped in the initial state shuts off the pistonupper chamber 32 and theaccumulator 21, and opens theexhaust passage 26. Therefore, the pistonupper chamber 32 connects to the exterior B1. Further, when thehead valve 22 is stopped in the initial state, thestriking part 13 stops at a top dead center with thepiston 29 contacting with thehead valve 22. - Next, the
microcomputer 89 starts the timer when the operating force is applied to thetrigger 14. Themicrocomputer 89 turns on theswitch 90 when it detects that thepush lever 16 has been pressed against the workpiece W1 within a predetermined time from a time point when the operating force is applied to thetrigger 14. By doing so, a current flows through thesolenoid 76, and thevalve 75 switches from a discharge state shown inFIG. 4 to a supply state shown inFIG. 5 . Thevalve 75 in the supply state connects thepassage 81 and thepassage 80, and shuts off thepassage 81 and theexhaust passage 82. Therefore, the compressed air in theaccumulator 21 is supplied to thegas chamber 68 through thepassages gas chamber 68 rises. - Consequently, the
plunger 46 of thetrigger valve 45 operates against the energizing force of the energizingmember 65, and theplunger 46 stops at the operating position. The sealingmember 64 moves to thespace 57, and thespace 57 and the exterior B1 connect to each other via the shaft hole 51 and theexhaust passage 96. Further, the sealingmember 62 is pressed against thevalve element 48, and the sealingmember 62 seals theshaft hole 61. Therefore, thevalve element 48 operates against the force of the energizingmember 65 by the pressure of theaccumulator 21, and the sealing member 58 shuts off theaccumulator 21 and thepassage 52. In addition, the sealingmember 59 separates from thebody 47, and thepassage 52 and theexhaust passage 56 connect to each other. Therefore, the compressed air in thegas chamber 24 is discharged to the exterior B1 through thepassage 53, thepassage 52, and theexhaust passage 56. In this way, a state in which thetrigger valve 45 shuts off theaccumulator 21 and thepassage 52 and connects thepassage 52 and theexhaust passage 56 is the operating state of thetrigger valve 45. - When air is discharged from the
gas chamber 24, thehead valve 22 operates by the pressure in theaccumulator 21. As shown inFIG. 2 , thehead valve 22 is stopped in an operating state of separating from thecylinder 12. The stoppedhead valve 22 connects theaccumulator 21 and a pistonupper chamber 32, and shuts off theexhaust passage 26. The compressed air in theaccumulator 21 is supplied to the pistonupper chamber 32, and pressure in the pistonupper chamber 32 rises. Thestriking part 13 descends from a top dead center toward a bottom dead center under the pressure in the pistonupper chamber 32. Thedriver blade 30 hits thefastener 72 in theejection path 71, and thefastener 72 is driven into the workpiece W1. Further, as shown inFIG. 2 , thepiston 29 collides with thebumper 33. A position of thestriking part 13 at a time point when thepiston 29 collides with thebumper 33 is the bottom dead center. In addition, while thestriking part 13 is descending, pressure in the pistonlower chamber 35 rises. - After the
striking part 13 reaches the bottom dead center, themicrocomputer 89 turns off theswitch 90 when it detects that thepush lever 16 has separated from the workpiece W1. Consequently, thesolenoid 76 releases the magnetic attraction force, and theplunger 77 of thevalve 75 stops at the initial position shown inFIG. 4 by the energizingmember 86 and a pressing force due to a diameter difference between the sealingmember 83 and the sealingmember 85. Therefore, the air in thegas chamber 68 is discharged to the exterior B1. Consequently, theplunger 46 operates by the energizing force of the energizingmember 65 and the pressing force due to the diameter difference between the sealingmember 64 and the sealingmember 62, and theplunger 46 stops at the initial position shown inFIG. 4 . Further, thevalve element 48 operates by the energizing force of the energizingmember 65, connects theaccumulator 21 and thepassage 52, and shuts off thepassage 52 and theexhaust passage 56. In this way, thetrigger valve 45 switches from the operating state to the initial state. - When the
trigger valve 45 switches from the operating state to the initial state, thehead valve 22 operates to be pressed against thecylinder 12 and thehead valve 22 shuts off theaccumulator 21 and the pistonupper chamber 32 and opens theexhaust passage 26. Consequently, thestriking part 13 rises due to the pressure in the pistonlower chamber 35, and thestriking part 13 stops at the top dead center shown inFIG. 1 . The user selects the third mode, and can drive thefastener 72 into the workpiece W1 by operating to press thepush lever 16 against the workpiece W1 within a predetermined time from a time point when the operating force is applied to thetrigger 14. Accordingly, when the predetermined time elapses with the operating force applied to thetrigger 14, thefastener 72 cannot be driven even if thepush lever 16 is pressed against the workpiece W1. - Meanwhile, the
microcomputer 89 continues to turn off theswitch 90 when the operating force is applied to thetrigger 14 and a predetermined time elapses in a state where thepush lever 16 separates from the workpiece W1. Therefore, when thepush lever 16 is pressed against the workpiece W1 after the predetermined time has passed from the time point when the operating force is applied to thetrigger 14, thetrigger valve 45 maintains the initial state. That is, thestriking part 13 stops at the top dead center. Themicroprocessor 89 resets the timer once the user releases the operating force to thetrigger 14. - The
microcomputer 89 switches thevalve 75 between the discharge state shown inFIG. 4 and the supply state shown inFIG. 5 . Switching between the initial state and the operating state of thetrigger valve 45 is performed according to the pressure in thegas chamber 68. That is, thesolenoid 76 only controls the operation of theplunger 77 of thevalve 75. In other words, the magnetic attraction force of thesolenoid 76 required to operate theplunger 77 is lower than an operating force required to operate thevalve element 48 of thetrigger valve 45 against air pressure in theaccumulator 21. This makes it possible to prevent thesolenoid 76 becoming large. Further, the magnetic attraction force of thesolenoid 76 changes according to the current supplied from thepower supply 91. Therefore, this makes it possible to suppress an increase in a voltage applied to thesolenoid 76 and reduce an output of thepower supply 91. If thepower supply 91 is a DC power supply that can be attached to and detached to and from thehousing 11 or themagazine 17, it can be a small-capacity DC power supply. - Further, the
second end portion 70 of theplunger 46 is arranged at a position where it receives atmospheric pressure. Thesecond end portion 70 is exposed to the exterior B1. Therefore, when theplunger 46 is operated from the initial position to the operating position, an area where theplunger 46 receives the pressure in theaccumulator 21 can be narrowed. Accordingly, a force required to operate theplunger 46 from the initial position to the operating position can be reduced. Further, anend portion 77A of theplunger 77, which is close to the energizingmember 86, is arranged at a position of receiving the atmospheric pressure of the exterior B1 as shown inFIG. 5 . Therefore, the force required to operate theplunger 77 can be reduced. Further, anend portion 77B of theplunger 77, which is close to thesolenoid 76, is arranged at a position of receiving the atmospheric pressure of the exterior B1. Therefore, the force required to operate theplunger 77 can be reduced. -
FIG. 8 is a flowchart showing a usage example of the drivingtool 10. When the user selects the third mode in step S1, thepower switch 98 is turned on in step S2 to start themicrocomputer 89. Further, theswitch 90 is off at a time point when themicrocomputer 89 is started. When themicroprocessor 89 detects that the operating force is applied to thetrigger 14 in step S3, themicroprocessor 89 starts the timer. - The
microcomputer 89 determines in step S4 whether thepush lever 16 is pressed against the workpiece W1 within a predetermined time. When themicrocomputer 89 determines Yes in step S4, themicrocomputer 89 turns on theswitch 90. Therefore, thestriking part 13 operates from the top dead center toward the bottom dead center. When themicrocomputer 89 detects that thepush lever 16 has been separated from the workpiece W1 in step S6, it turns off theswitch 90 and ends a routine ofFIG. 8 . - When the
microcomputer 89 determines No in step S4, it continues to turn off theswitch 90 in step S7. Even if thepush lever 16 is pressed against the workpiece W1 in a state of step S7, theswitch 90 maintains off. When themicroprocessor 89 detects that the operating force of thetrigger 14 is released in step S8, it resets the timer in step S9 and ends the routine ofFIG. 8 . When the user selects the first mode or the second mode in step S1, the routine ofFIG. 8 is not performed and themicrocomputer 89 is stopped. - (Example in which User selects First Mode) When the user selects the first mode, the
microcomputer 89 is stopped and theswitch 90 is off. When the user selects the first mode and the operating force to thetrigger 14 is released to separate thepush lever 16 from the workpiece W1, thearm 42 separates from theplunger 46 as shown inFIG. 6(A) . That is, thetrigger valve 45 is maintained in the initial state. Further, when the user selects the first mode and the operating force is applied to thetrigger 14 to separate thepush lever 16 from the workpiece W1, thetrigger valve 45 is maintained in the initial state. - The user selects the first mode and the
push lever 16 is pressed against the workpiece W1 in a state of applying the operating force to thetrigger 14. Consequently, the operating forces of thetrigger 14 and thepush lever 16 are transmitted to theplunger 46 via thearm 42 as shown inFIG. 6B . Theplunger 46 operates against the energizing force of the energizingmember 65, and thetrigger valve 45 switches from the initial state to the operating state. Thestriking part 13 operates from the top dead center toward the bottom dead center. - When the
push lever 16 is separated from the workpiece W1 in a state where the user applies the operating force to thetrigger 14 after thestriking part 13 reaches the bottom dead center, theplunger 46 is operated by the energizing force of the energizingmember 65 and stops at the initial position. Thetrigger valve 45 switches from the operating state to the initial state. Thestriking part 13 operates from the bottom dead center toward the top dead center, and thestriking part 13 stops at the top dead center. - While the user selects the first mode to maintain the state of applying the operating force to the
trigger 14, the user can repeat more than once an operation of pressing thepush lever 16 against the workpiece W1 and an operation of separating thepush lever 16 from the workpiece W1. - (Example in which User selects Second Mode) When the user selects the second mode, the
microcomputer 89 is stopped. When the user selects the second mode and thepush lever 16 is separated from the workpiece W1 to release the operating force to thetrigger 14, thetrigger valve 45 maintains the initial state. Further, even when the user selects the second mode and thepush lever 16 is pressed against the workpiece W1 to release the operating force to thetrigger 14, thetrigger valve 45 maintains the initial state. - When the user selects the second mode and the operating force is applied to the
trigger 14 in the state of pressing thepush lever 16 against the workpiece W1, the operating force of thepush lever 16 and the operating force of thetrigger 14 are transmitted to theplunger 46 via thearm 42, as shown inFIG. 6(B) . Thetrigger valve 45 switches from the initial state to the operating state, and thestriking part 13 operates from the top dead center toward the bottom dead center. - When the user releases the operating force to the
trigger 14 to separate thepush lever 16 from the workpiece W1 after thestriking part 13 reaches the bottom dead center, theplunger 46 operates by the energizing force of the energizingmember 65 and thetrigger valve 45 switches from the operating state to the initial state. Thestriking part 13 operates from the bottom dead center toward the top dead center and thestriking part 13 stops at the top dead center. - When the user selects the second mode, the user can repeat more than once an operation of applying the operating force to the
trigger 14 with thepush lever 16 pressed against the workpiece W1 and an operation of separating thepush lever 16 from the workpiece W1 to release the operating force to thetrigger 14. - Incidentally, when the second mode is selected and when the
push lever 16 is pressed against the workpiece W1 in the state of applying the operating force to thetrigger 14, theshaft member 74 does not contact with thearm 42. Therefore, thetrigger valve 45 is maintained in the initial state shown inFIG. 4 . - (Second Embodiment) A second embodiment of a driving tool is shown in
FIGS. 9, 10, and 11 . Adriving tool 100 includes ahousing 101, anejection part 102, astriking part 103, apush lever valve 104, and atrigger valve 105. Thehousing 101 has abody part 106, ahandle 107, and ahead cover 108. Thebody part 106 has a cylindrical shape, and thehandle 107 is connected to thebody part 106. Thehead cover 108 is fixed to a first end portion of the body part in a longitudinal direction of thebody part 106. Theejection part 102 is fixed to a second end portion of the body part in the longitudinal direction of thebody part 106. An air hose is connected to thehandle 107. Thestriking part 103 is provided in thebody part 106. Thestriking part 103 is operable in a direction of a center line C1. - A
cylinder 109 is provided in thebody part 106. The center line C1 is a center line of thecylinder 109. Thecylinder 109 is movable along the center line C1. Theholder 135 is provided in thebody part 106. Theholder 135 has an annular shape, and theholder 135 positions thecylinder 109 with respect to thebody part 106 in a direction intersecting with the center line C1. Anaccumulator 110 is provided in thehandle 107, thebody part 106, and thehead cover 108. Compressed air supplied from the air hose is accumulated in theaccumulator 110. Theholder 135 forms afirst gas chamber 139 and asecond gas chamber 142. Thefirst gas chamber 139 is always connected to theaccumulator 110. - A
mount part 115 is fixed to an inner surface of thehead cover 108. Anexhaust valve chamber 114 is formed between thehead cover 108 and themount part 115. Themount part 115 has anexhaust passage 117. Theexhaust passage 117 connects to an exterior D1 of thehousing 101. Themount part 115 supports theexhaust valve 118. Theexhaust valve 118 is movable in the direction of the center line C1 with respect to themount part 115. Theexhaust valve 118 opens and closes theexhaust passage 117. - A
valve seat 119 is attached to themount part 115. Thevalve seat 119 is made of synthetic rubber, and thevalve seat 119 has apassage 116. Thepassage 116 connects to theexhaust passage 117. - The
striking part 103 has apiston 121 and adriver blade 122. Thepiston 121 is provided in thecylinder 109, and thepiston 121 is operable in thecylinder 109 in the direction of the center line C1. A pistonupper chamber 120 is formed between thepiston 121 and thevalve seat 119. The pistonupper chamber 120 connects to thepassage 116. Thepiston 121 receives pressure in the pistonupper chamber 120, and is energized in a direction away from thevalve seat 119 and in a direction along the center line C1. A sealingmember 113 is attached to an outer peripheral surface of thepiston 121. The sealingmember 113 contacts with the inner peripheral surface of thecylinder 109. - Further, a
bumper 128 is provided in thebody part 106. Thebumper 128 is provided between thecylinder 109 and theejection part 102 in the direction along the center line C1. Thebumper 128 is a cushioning member made of synthetic rubber. A portion of thebumper 128 is located in thecylinder 109. Thebumper 128 has ashaft hole 129. A pistonlower chamber 123 is formed between thepiston 121 and thebumper 128 in thecylinder 109. The sealingmember 113 airtightly separates the pistonlower chamber 123 and the pistonupper chamber 120. Areturn air chamber 124 is provided between thebody part 106 and an outer peripheral surface of thecylinder 109. Theholder 135 airtightly separates theaccumulator 110 and thereturn air chamber 124. -
Passages cylinder 109 are provided. Acheck valve 127 is provided on an outer surface of thecylinder 109. Thecheck valve 127 opens and closes thepassage 125. Thepassage 126 always connects the pistonlower chamber 123 and thereturn air chamber 124. Thepassage 126 is arranged between thepassage 125 and theejection part 102 in a direction along the center line C1. - Further, an energizing
member 130 is provided in thebody part 106. The energizingmember 130 is, as an example, a metal spring. Thecylinder 109 is energized by an energizing force of the energizingmember 130 so as to approach thevalve seat 119 in the direction along the center line C1. Thecylinder 109 is energized by pressure in thefirst gas chamber 139 in a direction of approaching thevalve seat 119. Thecylinder 109 is energized by pressure in thesecond gas chamber 142 in a direction away from thevalve seat 119. - The
ejection part 102 is fixed to thebody part 106, and theejection part 102 has anejection path 133. Thedriver blade 122 is operable in theshaft hole 129 and theejection path 133 in the direction along the center line C1. Thepush lever 134 is attached to theejection part 102, and thepush lever 134 is movable in the direction along the center line C1 with respect to theejection part 102. Amagazine 201 is attached to theejection part 102, andfasteners 202 housed in themagazine 201 are sequentially sent to theejection path 133. - Structures of the
trigger valve 105 and thepush lever valve 104 will be described with reference toFIGS. 12, 13, 14, and 15 . Thepush lever valve 104 includes aplunger 144, avalve element 146, avalve body 145, apressure chamber 180, and an energizingmember 147. Thevalve body 145 does not move relative to thehousing 101. Thevalve body 145 has a cylinder shape, and operably supports theplunger 144 and thevalve element 146. Thevalve body 145 has apassage 143 and anexhaust passage 161. Thepassage 143 connects to theexhaust valve chamber 114 via apassage 200. - The
plunger 144 and thevalve element 146 are operable along a center line A5. The energizingmember 147 is, as an example, a metal spring, and the energizingmember 147 energizes thevalve element 146. Thevalve element 146 connects and shuts off thepressure chamber 180 and thepassage 143. Theplunger 144 connects and shuts off thepassage 143 and theexhaust passage 161. Ashaft member 166 is operably provided with respect to thebody part 106. Theshaft member 166 is connected to thepush lever 134. Aguide member 150 is provided in thehousing 101, and theguide member 150 holds atransmission member 194. Theshaft member 166 and thetransmission member 194 operate along the center line A5. - An energizing
member 165 is provided between thevalve body 145 and thetransmission member 194. The energizingmember 165 is, as an example, a metal spring. An energizing force of the energizingmember 165 is transmitted to theshaft member 166 via thetransmission member 194. The energizingmember 165 energizes thetransmission member 194 and theshaft member 166 in a direction away from thetrigger valve 105. Astopper 203 is provided on thehousing 101, and theshaft member 166 pressed by the energizingmember 165 contacts with thestopper 203 and stops. When thepush lever 134 is pressed against the workpiece W1 and operates, an operating force of thepush lever 134 is transmitted to theshaft member 166. Theshaft member 166 operates against the energizing force of the energizingmember 165. An operating force of theshaft member 166 is transmitted to theplunger 144 and thetransmission member 194. When thetransmission member 194 contacts with anarm 177, thearm 177 operates. - The
trigger 148 is operably attached to thehousing 101 about asupport shaft 149. Thearm 177 is attached to thetrigger 148 via asupport shaft 178. Thearm 177 is rotatable about thesupport shaft 178 as a fulcrum. Anelastic member 179 is provided, and theelastic member 179 energizes thearm 177 and thetrigger 148. Thearm 177 and thetrigger 148, which are energized by theelastic member 179, contact with theguide member 150 and stop at an initial position. - The
trigger valve 105 has acylindrical guide part 151, a ball-shapedvalve element 155, aplunger 157, abody 158, and an energizingmember 191. Theguide part 151 has apassage 152, and thepassage 152 connects to thepressure chamber 180. Ashaft 159 is connected to thevalve element 155. Ashaft hole 160 penetrating thehandle 107 is provided, and an end portion of theshaft 159 is arranged in theshaft hole 160. Theshaft 159 and thevalve element 155 are operable in a direction along a center line A4. When thevalve element 155 is energized by the pressure in theaccumulator 110 and operates, it shuts off theaccumulator 110 and thepassage 152. When thevalve element 155 operates against the pressure in theaccumulator 110, it connects theaccumulator 110 and thepassage 152. - The
plunger 157 has aflange 162, and a sealingmember 163 is attached to an outer peripheral surface of theflange 162. Anair chamber 164 is formed between theflange 162 and thebody 158. A sealingmember 204 is provided on thebody 158, and the sealingmembers air chamber 164. Thebody part 106 has apassage 190 connecting to theair chamber 164. The energizingmember 191 energizes theplunger 157 in a direction away from thevalve element 155. The energizingmember 191 is, as an example, a metal spring. Theplunger 157 is energized by pressure in theair chamber 164 in a direction of approaching thevalve element 155 against the energizing force of the energizingmember 191. - A
passage 192 connects to theaccumulator 110. Further, avalve 75 and asolenoid 76 are provided in thehousing 101. When no current flows through thesolenoid 76, theplunger 77 operates by the energizing force of the energizingmember 86, and thevalve 75 is stopped in an initial state. Thevalve 75 in the initial state connects thepassage 190 and theexhaust passage 82, and shuts off thepassage 192 and thepassage 190. Therefore, theair chamber 164 connects to the exterior D1 via thepassage 190 and theexhaust passage 82. Accordingly, the pressure in theair chamber 164 becomes atmospheric pressure. - In contrast, when a current flows through the
solenoid 76, theplunger 77 operates against the energizingmember 86 and thevalve 75 is stopped in an operating state. Thevalve 75 in the operating state connects thepassage 192 and thepassage 190, and shuts off thepassage 190 and theexhaust passage 82. Therefore, compressed air in theaccumulator 110 is supplied to theair chamber 164 through thepassages air chamber 164 becomes higher than the atmospheric pressure. - The
driving tool 100 has a configuration shown inFIG. 7 . A user can operate amode selection lever 92 to mutually switch a first mode, a second mode, and a third mode. As shown inFIG. 9 , themode selection lever 92 is operable about an operatingshaft 92A with respect to thehousing 101, that is, is rotatably attached to thehousing 101. Asupport shaft 149 is provided on the operatingshaft 92A. Thesupport shaft 149 is provided at a position eccentric from a rotation center X1 shown inFIG. 14 . The rotation center X1 is a rotation center of the operatingshaft 92A. When themode selection lever 92 is operated, thesupport shaft 149 revolves around the rotation center X1. Therefore, when the mode is switched, thearm 177 operates in a direction intersecting with a center line A4 regardless of whether the operating force is applied to thetrigger 148. - A position of the
support shaft 149 in the first mode is a position farthest from theplunger 157. A position of thesupport shaft 149 in the third mode is a position closest to theplunger 157. A position of thesupport shaft 149 in the second mode is between the position of thesupport shaft 149 in the first mode and the position of thesupport shaft 149 in the third mode. A position of thesupport shaft 149 is a position in the direction intersecting with the center line A4. - When the first mode or the second mode is selected and the
push lever 134 is pressed against the workpiece W1 to then apply the operating force to thetrigger 148, thearm 177 is pressed against theplunger 157 and theplunger 157 operates. When the third mode is selected and thepush lever 134 is pressed against the workpiece W1 to then apply the operating force to thetrigger 148, thearm 177 is maintained in a state of separating from theplunger 157. - An example of using the
driving tool 100 will be described. - (Example of selecting Third Mode) When the user selects the third mode, the
microcomputer 89 starts. Further, when the operating force to thetrigger 148 is released, thearm 177 and thetrigger 148 are pressed against theguide member 150 and stop at the initial position as shown inFIG. 12 . - When the user separates the
push lever 134 from the workpiece W1, thepush lever valve 104 is stopped in the initial state. Theplunger 144 stops at the initial position and opens theexhaust passage 161. Further, thevalve element 146 stops at the initial position and shuts off thepressure chamber 180 and thepassage 143. When thepush lever valve 104 is stopped in the initial state, theexhaust valve chamber 114 and thesecond gas chamber 142 connect to the exterior D1 via thepassages exhaust passage 161. - Therefore, the
cylinder 109 stops at an initial position where it is pressed against thevalve seat 119 as shown inFIG. 9 . Thecylinder 109 stopping in the initial position shuts off theaccumulator 110 and the pistonupper chamber 120. Further, theexhaust valve 118 stops at the initial position. Theexhaust valve 118 stopping at the initial position opens theexhaust passage 117 as shown inFIG. 9 . The pistonupper chamber 120 is the same as atmospheric pressure, and thestriking part 103 stops at a top dead center. In addition, thetransmission member 194 stops at an initial position shown inFIG. 12 . - Further, when the third mode is selected, the
support shaft 149 stops at an operating position closest to theplunger 157. Therefore, even if the operating force is applied to thetrigger 148 and thepush lever 134 is pressed against the workpiece W1 to operate thetransmission member 194, thetransmission member 194 separates from thearm 177. That is, thearm 177 does not transmit the operating force of thepush lever 134 and the operating force of thetrigger 148 to theplunger 157. - The
microcomputer 89 turns off theswitch 90 when the third mode is selected and the operating force to thetrigger 148 is released to separate thepush lever 134 from the workpiece W1. Accordingly, thevalve 75 is stopped in a discharge state. When thevalve 75 is in the discharge state, thetrigger valve 105 is stopped in the initial state shown inFIG. 12 . Thetrigger valve 105 stopped in the initial state causes thevalve element 155 to shut off theaccumulator 110 and thepassage 152. - The
microprocessor 89 starts the timer when the operating force to thetrigger 148 is applied. Themicrocomputer 89 turns on theswitch 90 when thepush lever 134 is pressed against the workpiece W1 within a predetermined time from a time point when the operating force is applied to thetrigger 148. Therefore, thevalve 75 switches from the discharge state ofFIG. 12 to the supply state ofFIG. 13 . When thevalve 75 is in the supply state, the pressure in theair chamber 164 becomes higher than the atmospheric pressure and thetrigger valve 105 switches from the initial state to the operating state. Specifically, theplunger 157 operates by the pressure in theair chamber 164 against the force of the energizingmember 191. Theplunger 157 is pressed against thevalve element 155, thevalve element 155 operates against the force of theaccumulator 110, and thevalve element 155 connects theaccumulator 110 and thepassage 152. Therefore, the compressed air in theaccumulator 110 is supplied to thepressure chamber 180 through thepassage 152. - Further, when the
push lever 134 is pressed against the workpiece W1, the operating force of thepush lever 134 is transmitted to theplunger 144 via theshaft member 166 as shown inFIG. 13 . Theplunger 144 operates against the force of the energizingmember 165, and theplunger 144 shuts off thepassage 143 and theexhaust passage 161. In addition, theplunger 144 is pressed against thevalve element 146, thevalve element 146 operates against the force of the energizingmember 147, and thevalve element 146 stops at an operating position. Thevalve element 146 stopping at the operating position connects thepressure chamber 180 and thepassage 143. - Therefore, compressed air is supplied from the
pressure chamber 180 to theexhaust valve chamber 114 and thesecond gas chamber 142 through thepassages push lever valve 104 shuts off thepassage 143 and theexhaust passage 161 and connects thepressure chamber 180 and thepassage 143 is the operating state of thepush lever valve 104. - Consequently, as shown in
FIG. 10 , theexhaust valve 118 operates to close theexhaust passage 117. Further, thecylinder 109 operates against the force of the energizingmember 130, and thecylinder 109 separates from thevalve seat 119. Therefore, theaccumulator 110 and the pistonupper chamber 120 are connected to each other, and the pressure in the pistonupper chamber 120 rises. Thestriking part 103 descends from the top dead center toward the bottom dead center at the pressure in the pistonupper chamber 120. Thedriver blade 122 hits thefastener 202 in theejection path 133, and thefastener 202 is driven into the workpiece W1. - After the
striking part 103 drives thefastener 202 into the workpiece W1, thepiston 121 collides with thebumper 128. A position of thestriking part 103 at a time point when thepiston 121 collides with thebumper 128 is the bottom dead center. Further, while thestriking part 103 is descending, the pressure in the pistonlower chamber 123 rises. - When the user maintains the state of applying the operating force to the
trigger 148 and thepush lever 134 is separated from the workpiece W1 after thestriking part 103 reaches the bottom dead center, theplunger 144 operates by the force of the energizingmember 165 and connects thepassage 143 and theexhaust passage 161. Further, thevalve element 146 operates by the force of the energizingmember 147 to shut off thepressure chamber 180 and thepassage 143. In this way, when thepush lever valve 104 returns from the operating state to the initial state, theexhaust valve chamber 114 becomes atmospheric pressure. Further, thecylinder 109 operates by the force of the energizingmember 130, is pressed against thevalve seat 119, and is stopped in the initial state. Thecylinder 109 stopped in the initial state shuts off theaccumulator 110 and the pistonupper chamber 120, and opens theexhaust passage 117. Consequently, thestriking part 103 rises by the pressure in the pistonlower chamber 123, and thestriking part 103 stops at the time point when thepiston 121 contacts with thevalve seat 119. - Meanwhile, when the
microcomputer 89 detects that thepush lever 134 is separated from the workpiece W1, it turns off theswitch 90. Consequently, thevalve 75 switches from the supply state to the discharge state. Therefore, the air in theair chamber 164 is discharged to an exterior D1. Thus, theplunger 46 of thetrigger valve 105 operates by the emerging force of the energizingmember 65, and theplunger 146 is stopped in the initial state shown inFIG. 9 . Further, thevalve element 48 operates by the energizing force of the energizingmember 65, connects theaccumulator 21 and thepassage 52, and shuts off thepassage 52 and theexhaust passage 56. In this way, thetrigger valve 105 switches from the operating state to the initial state. - The user selects the third mode, and performs an operation of pressing the
push lever 134 against the workpiece W1 within a predetermined time with the operating force applied to thetrigger 148, so that the user can sequentially drive thefasteners 202. Further, themicrocomputer 89 continues to turn off theswitch 90 when a predetermined time has elapsed from the time point of applying the operating force to thetrigger 148 in the state of separating thepush lever 134 from the workpiece W1. Therefore, when thepush lever 134 is pressed against the workpiece W1 after the predetermined time has elapsed from the time point of applying the operating force to thetrigger 148, thetrigger valve 105 maintains the initial state. That is, thestriking part 103 stops at the top dead center and does not operate. Themicroprocessor 89 resets the timer once the user releases the operating force to thetrigger 148. That is, the flowchart ofFIG. 8 also applies to thedriving tool 100. - When the third mode is selected and the
valve 75 is switched between the discharge state and the supply state, thedriving tool 100 switches thetrigger valve 105 between the initial state and the operating state. Switching between the initial state and the operating state of thetrigger valve 105 is performed by pressure due to the compressed air in theaccumulator 110. Thesolenoid 76 only controls the operation of theplunger 77 of thevalve 75. Accordingly, thedriving tool 100 can obtain the same effect as that of the drivingtool 10. - Further, as shown in
FIG. 13 , the end portion 159A of theshaft 159 is arranged at a position where it receives atmospheric pressure, and is exposed to the exterior D1. Therefore, when theshaft 159 is operated, an area that receives the pressure in theaccumulator 110 can be narrowed. Accordingly, the operating force for switching thetrigger valve 105 from the initial state to the operating state can be reduced. - (Example in which User selects First Mode) When the user selects the first mode, the
microcomputer 89 is stopped. When the user selects the first mode and the user releases the operating force to thetrigger 148 to separate thepush lever 134 from the workpiece W1, thearm 177 is separated from theplunger 157 as shown inFIG. 14 . That is, thetrigger valve 105 maintains the initial state. Further, when the user selects the first mode and the operating force is applied to thetrigger 148 to separate thepush lever 134 from the workpiece W1, thetrigger valve 105 maintains the initial state. The user selecting the first mode, and thepush lever 134 is pressed against the workpiece W1 with the operating force applied to thetrigger 148. Consequently, the operating force of thepush lever 134 is transmitted to theplunger 144 via theshaft member 166, and thepush lever valve 104 switches from the initial state to the operating state. - Further, the operating force of the
shaft member 166 is transmitted to thetransmission member 194, and the operating force of thetransmission member 194 is transmitted to theplunger 157 via thearm 177 as shown inFIG. 15 . Therefore, thetrigger valve 105 switches from the initial state to the operating state. Accordingly, the compressed air in theaccumulator 110 is supplied to the pistonupper chamber 120, and thestriking part 103 descends. - When the
push lever 134 is separated from the workpiece W1 with the user applying the operating force to thetrigger 148 after thestriking part 103 reaches the bottom dead center, theplunger 144 operates by the energizing force of the energizingmember 165. Therefore, thepush lever valve 104 switches from the operating state to the initial state. Accordingly, thestriking part 103 rises, and thestriking part 103 stops at the top dead center. The user selects the first mode, and can repeat more than once the operation of pressing thepush lever 134 against the workpiece W1 and the operation of separating thepush lever 134 from the workpiece W1 in the state where the operating force is applied to thetrigger 148. - (Example in which User selects Second Mode) When the user selects the second mode, the
microcomputer 89 is stopped. When the user selects the second mode and thepush lever 134 is separated from the workpiece W1 to release the operating force to thetrigger 148, thetrigger valve 105 maintains the initial state and thepush lever valve 104 maintains the initial state. Further, when the user selects the second mode and the user presses thepush lever 134 against the workpiece W1 to release the operating force to thetrigger 148, thepush lever valve 104 maintains the operating state and thetrigger valve 105 maintains the initial state. - When the user selects the second mode and the operating force is applied to the
trigger 148 with thepush lever 134 pressed against the workpiece W1, thearm 177 operates about thetransmission member 194 as a fulcrum as shown inFIG. 15 and thearm 177 is pressed against theplunger 157 and thetrigger valve 105 switches from the initial state to the operating state. Therefore, thestriking part 103 decreases descends. - When the user releases the operating force to the
trigger 148 or separates thepush lever 134 from the workpiece W1 after thestriking part 103 reaches the bottom dead center, thetrigger valve 105 switches from the operating state to the initial state. Therefore, thestriking part 103 rises, and thestriking part 103 stops at the top dead center. When the user selects the second mode, the user can repeat more than once the operation of applying the operating force to thetrigger 148 and the operation of separating thepush lever 134 from the workpiece W1 to release the operating force to thetrigger 148 in the state where thepush lever 134 is pressed against the workpiece W1. - Incidentally, when the second mode is selected and when the
push lever 134 is pressed against the workpiece W1 with the operating force applied to thetrigger 148, thetransmission member 194 does not contact with thearm 177. Accordingly, thetrigger valve 105 maintains the initial state. Incidentally, as described in the first embodiment,various sensors 94 can be provided in thehousing 101. Thevarious sensors 94 include at least one or more of a pressure sensor, a temperature sensor, a humidity sensor, and an acceleration sensor. If thehousing 101 is provided with a display unit, themicrocomputer 89 processes signals of thevarious sensors 94 and themicrocomputer 89 can display on the display unit and warn: an operating time from the operation of the user to the operation of thestriking part 103; operating speed of thestriking part 103; and an inspecting and repairing time of thebumper 128. - An example of the meaning of the matters disclosed in the embodiments is as follows. The
driving tools accumulators upper chambers striking parts fasteners triggers trigger valves trigger valves trigger valves mode selection lever 92, thetrigger 14, and thearm 42 are examples of mode switching mechanisms. Themode selection lever 92, thetrigger 148, and thearm 177 are examples of mode switching mechanisms. - The
valve 75 is an example of a valve. The supply state of thevalve 75 is an example of a supply state. The discharge state of thevalve 75 is an example of a discharge state. Thesolenoid 76 is an example of an actuator. Theplungers valve element 155 are examples of a first operating member. Thegas chambers plunger 77 is an example of a second operating member. Thetrigger switch 87, thepush lever switch 88, and themicrocomputer 89 are examples of detectors. Themicrocomputer 89 and theswitch 90 are examples of controllers. A processing in which themicrocomputer 89 proceeds from step S4 to step S5 inFIG. 8 is an example of first control. A processing in which themicrocomputer 89 proceeds from step S4 to step S7 inFIG. 8 is an example of second control. - The driving tool is not limited to the disclosed embodiments, and can be variously changed without departing from the gist thereof. The gas is compressible gas, and includes inert gas such as nitrogen gas and noble gas besides air. Further, in
FIG. 7 , regardless of the mode selected, a current of thepower supply 91 may flow through themicrocomputer 89 to start themicrocomputer 89. In this case, amode detection sensor 93 is provided. Themode detection sensor 93 detects the mode selected by operating themode selection lever 92 and outputs a signal. Themicrocomputer 89 can turn on theswitch 90 when it detects that the third mode has been selected. Themicrocomputer 89 keeps theswitch 90 off when it detects that the first mode or the second mode has been selected. - The actuator is a mechanism in which a current flows to operate the
plunger 77 of thevalve 75 against the force of the energizingmember 86. As the actuator, an electric motor and a rack and pinion mechanism can be used instead of thesolenoid 76. The electric motor rotates when a current is supplied, and stops when the current is shut off. The rack and pinion mechanism converts a rotation force of the electric motor into the operating force of theplunger 77 of thevalve 75. - The operating member includes a lever, a button, an arm and the like. The operation of the operating member may be either a rotational operation within a predetermined angle range or a linear reciprocating operation. The controller may be a single electric component or electronic component, or may be a unit having a plurality of electric components or a plurality of electronic components. Electrical or electronic components include a processor, a control circuit, and a module. The pressure chamber and the air chamber include spaces, areas and passages where a gas is supplied and discharged. A path for supplying the gas to the pressure chamber includes a port, a passage, a hole, and a gap. The first mode can be defined as a continuous mode, and the second mode can be defined as a single mode.
- 10, 100 . . . Driving tool; 13, 103 . . . Striking part; 14, 148 . . . Trigger; 16, 134 . . . Push lever; 21, 110. . . Accumulator; 32, 120 . . . Piston upper chamber; 42, 177 . . . Arm; 45, 105 . . . Trigger valve; 46, 77, 157 . . . Plunger; 68, 164 . . . Gas chamber; 72, 202 . . . Fastener; 75 . . . Valve; 76 . . . Solenoid; 87 . . . Trigger switch; 88 . . . Push lever switch; 89 . . . Microcomputer; 90 . . . Switch; 92 . . . Mode selection lever; and 155 . . . Valve element.
Claims (12)
1-9. (canceled)
10. A driving tool comprising:
a gas accommodating chamber accommodating a gas;
a pressure chamber to which the gas is supplied from the gas accommodating chamber;
a striking part operating in a direction of hitting a fastener by pressure in the gas supplied to the pressure chamber;
an operating member to and from which an operating force of a user is applied and released; and
an actuator shutting off the gas accommodating chamber and the pressure chamber when the operating force to the operating member is released, and connecting the gas accommodating chamber and the pressure chamber by operating due to power supplied when the operating force to the operating member is added.
11. The driving tool according to claim 10 , further comprising:
a first operating member operating to shut off and connect the gas accommodating chamber and the pressure chamber; and
a gas chamber causing the first operating member to operate,
wherein the actuator operates to supply or discharge the gas in the gas accommodating chamber to or from the gas chamber.
12. The driving tool according to claim 11 , further comprising a valve including a supply state of supplying the gas in the gas accommodating chamber to the gas chamber and a discharge state of discharging the gas supplied to the gas chamber,
wherein the actuator switches the supply state and the discharge state of the valve.
13. The driving tool according to claim 10 , further comprising:
a detector detecting application and release of an operating force to the operating member and
a controller controlling supply and stop of power to the actuator based on a detection result of the detector,
wherein the controller performs:
control for stopping the supply of the power to the actuator when the operating force to the operating member is released, and
control for supplying the power to the actuator when the operating force is applied to the operating member.
14. The driving tool according to claim 13 ,
wherein the operating member has:
a trigger to which the user applies an operating force; and
a contact member capable of contacting with and separating from a workpiece into which the fastener is driven, and
the controller performs:
first control for admitting the supply of the power to the actuator when the contact member is caused to contact with the workpiece and the operating force is applied to the contact member within a predetermined time from a time point when the operating force is applied to the trigger; and
second control for stopping the supply of the power to the actuator when the predetermined time elapses from the time point when the operating force is applied to the trigger in a state where the contact member separates from the workpiece.
15. The driving tool according to claim 14 ,
wherein the controller includes:
a first mode selected by the user before performing an operation of causing the contact member to contact with the workpiece in the state where the operating force is applied to the trigger; and
a second mode selected by the user before performing an operation of applying the operating force to the trigger in a state where the contact member contacts with the workpiece.
16. The driving tool according to claim 12 ,
wherein the valve has a second operating member, and
an end portion of the first operating member in an operating direction, and an end portion of the second operating member in the operating direction are each arranged at a position that receives atmospheric pressure.
17. The driving tool according to claim 12 ,
wherein the valve has a second operating member, and
both ends of the second operating member in an operating direction are each arranged at a position that receives atmospheric pressure.
18. The driving tool according to claim 10 , further comprising a controller provided to control supply and stop of power to the actuator
wherein the operating member includes:
a trigger to which the user applies an operating force;
a contact member capable of contacting with and separating from a workpiece into which the fastener is driven, an operating force being applied to the contact member by contacting with the workpiece, and
the controller causes the striking part to operate in a direction of hitting the fastener by supplying power to the actuator when the contact member contacts with the workpiece to apply an operating force to the contact member within a predetermined time from a time point when an operating force is applied to the trigger.
19. A driving tool comprising:
a gas accommodating chamber accommodating a gas;
a pressure chamber to which the gas is supplied from the gas accommodating chamber;
a striking part operating in a direction of hitting a fastener by pressure in the gas supplied to the pressure chamber;
an operating member to and from which an operating force of a user is applied and released;
a valve including a supply state of supplying the gas in the gas accommodating chamber to the gas chamber and a discharge state of discharging the gas supplied to the gas chamber; and
an actuator switching the supply state and the discharge state by operating due to power supplied when the operating force to the operating member is added.
20. A driving tool comprising:
a gas accommodating chamber accommodating a gas;
a pressure chamber to which the gas is supplied from the gas accommodating chamber;
a striking part operating in a direction of hitting a fastener by pressure in the gas supplied to the pressure chamber;
an operating member to and from which an operating force of a user is applied and released;
a switching mechanism having a first state of shutting off the gas accommodating chamber and the pressure chamber when the operating force to the operating member is released, and a second state of connecting the gas accommodating chamber and the pressure chamber when the operating force is applied to the operating member;
a valve having a supply state of supplying the gas in the gas accommodating chamber to the switching mechanism to make the switching mechanism the second state, and a discharge state of discharging the gas supplied to the switching mechanism to make the switching mechanism the first state; and
an actuator operated by supply of power and switching the supply state and the discharge state of the valve,
wherein the switching mechanism has:
a first operating member operating to shut off and connect the gas accommodating chamber and the pressure chamber; and
a gas chamber causing the first operating member to operate,
the valve has a second operating member that operates to supply or discharge the gas in the gas accommodating chamber to or from the gas chamber, and
the actuator causes the second operating member to operate.
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JP2019-037232 | 2019-03-01 | ||
JP2019037232 | 2019-03-01 | ||
PCT/JP2020/003667 WO2020179305A1 (en) | 2019-03-01 | 2020-01-31 | Driving machine |
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US20220143797A1 true US20220143797A1 (en) | 2022-05-12 |
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US17/434,319 Abandoned US20220143797A1 (en) | 2019-03-01 | 2020-01-31 | Driving tool |
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JP (1) | JPWO2020179305A1 (en) |
TW (1) | TW202033324A (en) |
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US20220105614A1 (en) * | 2020-10-06 | 2022-04-07 | Kyocera Senco Industrial Tools, Inc. | Pnuematic fastening tool with wireless sensor package |
US11583986B2 (en) * | 2020-03-18 | 2023-02-21 | De Poan Pneumatic Corp. | Air-path structure of pneumatic nail gun |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7516311B2 (en) | 2021-05-06 | 2024-07-16 | 愛三工業株式会社 | Fuel Tank Structure |
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US20170209995A1 (en) * | 2016-01-26 | 2017-07-27 | Hitachi Koki Co., Ltd. | Driving machine |
US20180117748A1 (en) * | 2015-03-24 | 2018-05-03 | Makita Corporation | Driving tool |
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CA2179524A1 (en) * | 1994-10-21 | 1996-05-02 | Charles J. Moorman | Pneumatic fastener driving tool and an electronic control system therefor |
JP3287172B2 (en) * | 1995-04-05 | 2002-05-27 | マックス株式会社 | Nailer trigger device |
JP2001293668A (en) * | 2000-04-17 | 2001-10-23 | Max Co Ltd | Nailing machine |
US9381633B2 (en) * | 2012-10-22 | 2016-07-05 | Illinois Tool Works Inc. | Fastener-driving tool including a reversion trigger |
JP6623662B2 (en) * | 2015-10-09 | 2019-12-25 | マックス株式会社 | Driving machine |
-
2020
- 2020-01-31 JP JP2021503469A patent/JPWO2020179305A1/en not_active Abandoned
- 2020-01-31 US US17/434,319 patent/US20220143797A1/en not_active Abandoned
- 2020-01-31 WO PCT/JP2020/003667 patent/WO2020179305A1/en active Application Filing
- 2020-02-20 TW TW109105387A patent/TW202033324A/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20180117748A1 (en) * | 2015-03-24 | 2018-05-03 | Makita Corporation | Driving tool |
US20170209995A1 (en) * | 2016-01-26 | 2017-07-27 | Hitachi Koki Co., Ltd. | Driving machine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US11583986B2 (en) * | 2020-03-18 | 2023-02-21 | De Poan Pneumatic Corp. | Air-path structure of pneumatic nail gun |
US20220105614A1 (en) * | 2020-10-06 | 2022-04-07 | Kyocera Senco Industrial Tools, Inc. | Pnuematic fastening tool with wireless sensor package |
US12036649B2 (en) * | 2020-10-06 | 2024-07-16 | Kyocera Senco Industrial Tools, Inc. | Pnuematic fastening tool with wireless sensor package |
Also Published As
Publication number | Publication date |
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JPWO2020179305A1 (en) | 2021-12-23 |
WO2020179305A1 (en) | 2020-09-10 |
TW202033324A (en) | 2020-09-16 |
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